diff --git a/17/a.py b/17/a.py
new file mode 100644
index 0000000..205f786
--- /dev/null
+++ b/17/a.py
@@ -0,0 +1,8 @@
+
+import itertools
+from copy import deepcopy
+
+ic = [ list(x) for x in open('input').read().splitlines() ]
+
+[print(x) for x in ic]
+
diff --git a/18/a.py b/18/a.py
new file mode 100644
index 0000000..d882f1a
--- /dev/null
+++ b/18/a.py
@@ -0,0 +1,48 @@
+
+import ast
+import math
+
+exprs = open('input').read().splitlines()
+
+def specialeval(expr):
+    expr_arr = ('+ '+expr).replace('(', '( + ').replace(')', ' ) ').split(' ')
+    stack = [0]
+    opstack = []
+    level = 0
+    # print(expr_arr)
+    for i in range(0,len(expr_arr)-1,2):
+        # print(stack)
+        # print([expr_arr[i], expr_arr[i+1]])
+        op = expr_arr[i]
+        if expr_arr[i+1] == '(':
+            level += 1
+            stack.append(0)
+            opstack.append(expr_arr[i])
+        else:
+            # print(expr_arr[i+1])
+            if op == '+':
+                stack[level] += int(expr_arr[i+1])
+            elif op == '*':
+                stack[level] *= int(expr_arr[i+1])
+            else: # )
+                op = opstack[level-1]
+                if op == '+':
+                    stack[level-1] += int(stack[level])
+                elif op == '*':
+                    stack[level-1] *= int(stack[level]) 
+                level -= 1
+                stack.pop()
+                opstack.pop()
+    return stack[0]
+
+def a(exprs):
+    return sum([specialeval(expr) for expr in exprs])
+
+def b(exprs):
+    return sum([
+        specialeval('('+(expr+' * 1').replace('(','((').replace(')','))').replace(' * ', ') * (')+')')
+        for expr in exprs
+    ])
+
+print(a(exprs))
+print(b(exprs))
\ No newline at end of file
diff --git a/19/a.py b/19/a.py
new file mode 100644
index 0000000..e83ee0b
--- /dev/null
+++ b/19/a.py
@@ -0,0 +1,32 @@
+
+import re
+
+# Fook the other solution attempt (a.py.OLD):
+# I'm using grep -P now. - getting lazy.
+
+rules = { rule[0]:'( '+rule[1].replace('"','')+' )' for x in open('input_rules').read().splitlines() if (rule := x.split(': ')) }
+rules.update({i:rules[i].replace('( ','').replace(' )','') for i in rules if (rules[i] in ['( a )','( b )'])})
+# print(rules)
+def expand(rules,breaker): #You know the rules, and so do I
+    mod = False
+    for i in rules:
+        rule = rules[i].split(' ')
+        # print(rule)
+        j = 0
+        for k in rule:
+            if k.isnumeric():
+                mod = True
+                rule[j] = rules[k]
+            j += 1
+        rules[i] = ''.join(rule)
+    if mod and breaker < 4:
+        breaker += 1
+        rules = expand(rules, breaker)
+    return rules
+# print("grep -P '"+expand(rules)['0']+"' input")
+print()
+regxp = re.compile('^'+expand(rules,0)['0']+'$')
+matched = [ x for x in open('input').read().splitlines() if (regxp.match(x))]
+# [print(x)for x in matched]
+print(len(matched))
+
diff --git a/19/a.py.OLD b/19/a.py.OLD
new file mode 100644
index 0000000..2728c0c
--- /dev/null
+++ b/19/a.py.OLD
@@ -0,0 +1,52 @@
+from copy import deepcopy
+import itertools
+
+def unpack(table):
+    replacable = []
+    replacable_idx = []
+    for i in range(len(table)):
+        if type(table[i]) == type([]):
+            replacable.append(list(itertools.product(*table[i])))
+            replacable_idx.append(i)
+
+    solutions = []
+    for x in list(itertools.product(*replacable)):
+        t_ = deepcopy(table)
+        i = 0
+        for y in x:
+            t_[replacable_idx[i]] = list(y)
+            i += 1
+        solutions.append(list(itertools.chain(*t_)))
+    return solutions
+
+def unpackrules(rules): #You know the rules, and so do I
+    for rule_n in rules:
+        rule = rules[rule_n]
+        for j in range(len(rule)):
+            subrule = rule[j]
+            for i in range(len(subrule)):
+                if subrule[i] in list(ab.keys()):
+                    subrule[i] = ab.get(subrule[i])
+                else:
+                    subrule[i] = rules[subrule[i]]
+            rule[j] = subrule
+        rules[rule_n] = unpack(rule)
+    return rules
+
+rules = { y[0]:[ z.split(' ') for z in y[1].split(' | ') ] for x in open('input_rules').read().splitlines() if (y := x.split(': ')) }
+ab = { x:rules[x][0][0].replace('"','') for x in rules if (rules[x][0][0] == '"a"' or rules[x][0][0] == '"b"')}
+[ rules.pop(x) for x in ab ]
+
+print(unpackrules(rules))
+
+        
+
+# print(unpack(['a', [['2', '3', '76'], ['3', '2']], 'b', [['2', '3'], ['3', '2']], [['2', '3'], ['3', '2']]]))
+# print(list(itertools.permutations(['a', [['2', '3', '76'], ['3', '2']], 'b', [['2', '3'], ['3', '2']], [['2', '3'], ['3', '2']]])))
+
+
+# rules = { x[0]:x[1] for x in [ rule.split(': ') for rule in open('input_rules').read().splitlines() ]}
+# ab = { x:rules[x].replace('"','') for x in rules if (rules[x] in ['"a"', '"b"'])}
+# rules.update(ab)
+# print(rules)
+# print(ab)
\ No newline at end of file
diff --git a/19/whiteboard.png b/19/whiteboard.png
new file mode 100644
index 0000000..10071f6
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