Babaza Game

def bestStep(start: str, goal: str):
    print(start)
    if start != goal:
        oneMove = True
        for i in range(0,len(start)-1):
            oneMove = oneMove and (start[i] == goal[i] or start[i+1] == goal[i+1])
        if oneMove:
            return bestStep(goal,goal)
        blocked = [False for i in range(0,len(start))]
        for i in range(0,len(start)-1):
            blocked[i] = blocked[i]     or (start[i+1] == goal[i])
            blocked[i+1] = blocked[i+1] or (start[i] == goal[i+1])
        twoMove = True
        for i in range(0,len(start)-1):
            twoMove = twoMove and (not blocked[i] or not blocked[i+1])
        free = list(set(list(map(chr, range(ord('A'), ord('Z')+1)))).difference(set(list(start)).union(set(list(goal)))))[0]
        if twoMove:
            def helper(i):
                if blocked[i]: 
                    return start[i] 
                else: 
                    return goal[i]
            
            return bestStep(''.join([helper(i) for i in range(0,len(start))]),goal)
        def helper2(i):
            if ((i%2) == 1): 
                return free 
            else: 
                return start[i]
        return bestStep(''.join([helper2(i) for i in range(0,len(start))]),goal)
                
                

bestStep(input(),input())

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: ACCEPTED

Test 13

Verdict: WRONG ANSWER

Test 14

Verdict: WRONG ANSWER