# n = input()
# num = 0
# for str in reversed(n):
#     if str != ' ':
#         num += 1
#     else:
#         break
# print(num)
ipt = input().split()
word = ipt[-1]
print(len(word))

split以空格分割输入字符串，输出最后一个字符串的长度。但该方法比用循环方法时间长了2ms