a = input() k = 0 h = 0 l = len(a) i = 1 while 0 < i < l: if a[i - 1] != a[l - i] and a[i - 1] == a[l - i - 1]: k = l - i + 1 a = a[:(l - i)] + a[(l - i + 1):] l -= 1 break elif a[i - 1] != a[l - i] and a[l - i - 1] == a[i - 1]: k = i a = a[:i - 4] + a[i - 3:] l -= 1 break else: i += 1 print(a) for i in range(l): if a[i] != a[l - i - 1]: h = 1 if h == 1: print(0) else: print(k)