# coding: utf-8
import math, copy, collections
from collections import deque
s =input()
n = len(s)
ans = 2
q = deque()
q.append(s[0])

for i in range(1,n):
    if len(q) > 0:
        if s[i]==q[-1]:
            pass
        else:
            q.append(s[i])
            ans += 1
    """
    else:
        q.append(s[i])
        ans += 1
    """
print(ans)