s = input()
cnt = 0
good = False
for i in range(len(s)):
    if ('a' <= s[i] <= 'z' or 'A' <= s[i] <= 'Z' or (i - 1 >= 0 and i + 1 < len(s)
        and s[i] == '-' and ('a' <= s[i - 1] <= 'z' or 'A' <= s[i - 1] <= 'Z')
        and ('a' <= s[i + 1] <= 'z' or 'A' <= s[i + 1]))):
        good = True
        continue
    else:
        if (good):
            cnt += 1
            good = False
if ('a'<= s[-1] <= 'z' or 'A' <= s[-1] <= 'Z'):
    cnt += 1
print(cnt)