#include <stdio.h>

int main()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    char str[31];
    scanf("%s", str);
    int i = 0;;
    while (str[i] != '.')
        i++;

    if (str[i - 1] == 'e')
    {
        str[i] = 'r';
    }
    else if ((str[i - 1] == 'r') && (str[i - 2] == 'e'))
    {
        str[i - 1] = 's';
        str[i] = 't';
    }
    else
    {
        str[i] = 'e';
        str[i+1] = 'r';
        for (int j = i + 2; j < 31; j++)
            str[j] = '\0';
    }

    printf("%s", str);
    return 0;
}