#include<bits/stdc++.h>
using namespace std;
int samenumber,now;
int main(){
	int t;
	cin >> t;
	while(t--){
		string a,b;
		cin >> a >> b;
		if(a == b){
			cout << "similar" << endl;
			continue;
		}
		if(a.size() == b.size()){
			for(int i = 0; i < a.size(); i++){
				if(a[i] == b[i]){
				    samenumber++;
				}
			}
			if(a.size() - samenumber == 1){
				cout << "similar" << endl;
			}
			else{
			    cout << "not similar" << endl;
			}
			continue;
		}
		if(a.size() > b.size()){
		    swap(a,b);
		    if(b.size() - a.size() > 1){
		        cout << "not similar" << endl;
		        continue;
		    }
		}
		for(int i = 0; i < b.size(); i++){
			if(a[now] == b[i]){
			    samenumber++;
			    now++;
			}
		}
		if(samenumber == a.size()){
			cout << "similar" << endl;
			continue;
		}
		cout << "not similar" << endl;
	}
    return 0;
}