f = open('24-j6.txt')
s = f.readline()
kol = 0
for i in range(5):
    if s[i] < s[i+1]:
        p = 1
    else:
        p = 0
        break
if p == 1 and s[5] > s[4]:
    kol += 1
for i in range(1, len(s)-4):
    p = 0
    for j in range(i, i+5):
        if s[j] > s[j-1]:
            p += 1
    if p == 4 and s[i+4] >= s[i+5] and s[i] <= s[i-1]:
        kol += 1
print(kol)