水。
#include <iostream>
#include <cstdio>
using namespace std;
int main()
{
int T;
scanf("%d", &T);
while(T--)
{
int n;
scanf("%d", &n);
int a = n % 10;
int b = (n / 10) % 10;
if(b == 1)
printf("%dth\n", n);
else
{
if(a == 1)
printf("%dst\n", n);
else if(a == 2)
printf("%dnd\n", n);
else if(a == 3)
printf("%drd\n", n);
else
printf("%dth\n", n);
}
}
return 0;
}