mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    S = input().rstrip('\n')

    s = 0
    ans = 0
    for i in range(len(S)):
        if S[i] == "S":
            s += 1
        elif S[i] == "i":
            if i+2 < len(S):
                if S[i+1] == "n" and S[i+2] == "g":
                    ans += s
    print(ans)


if __name__ == '__main__':
    main()