1.1 KB | 1106 chars
"""
[33883: Acentuación del idioma español](https://www.acmicpc.net/problem/33883)
Tier: Bronze 3
Category: implementation, string
"""
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
SYS_INPUT = True
RECURSION_LIMIT = 10 ** 7
SET_RECURSION = False
BLANK = " "
if SET_RECURSION:
sys.setrecursionlimit(RECURSION_LIMIT)
inp = lambda : sys.stdin.readline().rstrip() if SYS_INPUT else input()
mii = lambda : [*map(int,inp().split())]
mfi = lambda : [*map(float,inp().split())]
ii = lambda : int(inp())
fi = lambda : float(inp())
isplit = lambda : inp().split()
p = print
def gcd(a, b): return gcd(b, a % b) if b > 0 else a
def lcm(a, b): return a * b // gcd(a, b)
def is_vowel(c):
return c in "aeiou"
def solve():
s = input()
idx = []
for i in range(len(s)):
if is_vowel(s[i]):
idx.append(i + 1)
if s[-1] not in "ns" and not is_vowel(s[-1]):
print(idx[-1] if len(idx) > 0 else -1)
else:
print(idx[-2] if len(idx) > 1 else -1)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()