#include<iostream>
#include<string>
#include<assert.h>

//WA->ok
//RE->ng

int main(){
    int n;
    std::cin >> n;
    assert(1<=n && n<=500000);
    int a,b,c;
    std::cin >> a >> b >> c;
    assert(1<=a && a<=1000000);
    assert(1<=b && b<=1000000);
    assert(1<=c && c<=1000000);
    std::string s;
    while(n--){
        std::cin >> s;
        assert(1<=s.size() && s.size()<=10);
        for(char c:s)assert(islower(c));
    }
}