#include <iostream>
#include <fstream>
using namespace std; 
int main(){
	freopen("DATA2.txt","r",stdin); 
	freopen("OUT2.txt","w",stdout);
	int s, x;
	char y;
	cin>>x>>y;
	s=x;
	while(s>9){
		s=0;
		while(x>0){
			s+=x%10;
			x/=10;
		}
		x=s;
	}	
	if(char(s+64)==y)
		cout<<"match"<<endl;
	else
		cout<<"error"<<endl;
	return 0;
}