936C - Lock Puzzle - CodeForces Solution

n = int(input())
src, tar = input(), input()
ans = []

def shift(s, x):
    ans.append(x)
    return s[-x:][::-1] + s[:-x]

flag = True
for i in range(n):
    index = -1
    for j in range(n-i):
        if src[j] == tar[i]:
                        index = j
            break
    if index == -1:
        flag = False
        break
    if index == n-1:
        continue
    src = shift(src, n - index - 1)
    src = shift(src, 1)
    src = shift(src, n)
    
if flag:
    ans = [str(x) for x in ans]
    print(len(ans))
    print(' '.join(ans))
else:
    print(-1)