#include <cstdio>
#include <iostream>
#include <algorithm>
#include <cstring>
#include <cstdlib>
#define oo 987654321
using namespace std;

int main()
{
    char f[100];
    int st, n[10], mode, cnt = 1, md;
    for(int i = 1 ; i <= 4 ; i++ )
    {
        sprintf(f, "ren sample_%02d.txt .%d.in", i, cnt++);
        system(f);
    }
    for(int i = 1 ; i <= 12 ; i++ )
    {
        sprintf(f, "ren stest_%02d.txt .%d.in", i, cnt++);
        system(f);
    }
    for(int i = 13 ; i <= 28 ; i++ )
    {
        sprintf(f, "ren test_%02d.txt .%d.in", i, cnt++);
        system(f);
    }
}