#include<stdio.h>
int reverse(int n){
	int r=0;
	while(n!=0){
		r=r*10+(n%10);
		n=n/10;
	}
	return r;
}
int main(){
	int tc,p,q;
	scanf("%d",&tc);
	while(tc--){
		int n,m;
		scanf("%d%d",&n,&m);
		p=reverse(n);
		q=reverse(m);
		printf("%d\n",reverse(p+q));

	}
}