s = str(input())
n = len(s)
if n < 4:
    print(0)
    exit()
C = [0]*n
for i, c in enumerate(s):
    if c == 'S':
        C[i] += 1
from itertools import accumulate
C = [0]+C
C = list(accumulate(C))
ans = 0
for i in range(n-3+1):
    if s[i] == 'i' and s[i+1] == 'n' and s[i+2] == 'g':
        ans += C[i]
print(ans)