#Code Written by : John Nixon
#Date: 11:10:2022  Time: 13:08:18
#Copyrights are applicable
import sys
import os
sys.setrecursionlimit(10000)
try:
    sys.stdin = open('./input.txt', 'r')
    sys.stdout = open('./output.txt', 'w')
except:
    pass

given_str = input()

words = given_str.split()
ans = ""
for word in words:
    cnt = 0
    prev_char = word[0]
    for char in word[1:]:
        if prev_char < char:
            cnt += 1
        prev_char = char
    ans += str(cnt)

print(ans)