import sys
words = list(sys.stdin.readline().strip().split())
print(len(words[-1]))





# words = input()
# count_up = 0
# count_ca = 0
# max_len = 0
# for char in words:
#     if char.isupper():
#         max_len = count_up + count_ca
#         count_up += 1
#     elif char.islower():
#         count_ca += 1
# print(len(words)- max_len )
# 这是我想到“如果题目变成不给空格禁止你切怎么办”的解答