from bisect import *

S = input()

T = []
for i in range(len(S)):
    if S[i] == 'i':
        if i < len(S) - 3:
            if S[i + 1] == 'n' and S[i + 2] == 'g':
                T.append(i)
                i += 2
ans = 0
for i in range(len(S)):
    if S[i] == 'S':
        ans += len(T) - bisect_left(T, i)

print(ans)