$rt$ ，

#include <iostream>
#include <cmath>
using namespace std;
const int N=1e6+1000;
int n;
signed main(){
	cin>>n;
	while(n--){
		string a,b;
		cin>>a>>b;
		int l1=a.length(),l2=b.length();
		if (abs(l1-l2)>1){
			cout<<"not similar"<<endl;
			continue;
		}
		else{
			if (l1==l2){
				int different=0;
				for (int i=0;i<l1;i++){
					if (a[i]!=b[i]){
						different++;
					}
				}
				if (different>1){
					cout<<"not similar"<<endl;
				}
				else{
					cout<<"similar"<<endl;
					continue;
				}
			}
			else{
				int d=0; 
				for (int i=0;i<max(l1,l2);i++){
					if (a[i]!=b[i]){
						for (int j=i+1;j<max(l1,l2);j++){
							if (a[j]!=b[j] && (a[j]>='a' && a[j]<='z') && (b[j]>='a' && b[j]<='z')){
								cout<<"not similar"<<endl;
								break;d=1;
							}
						}
						break;
					}
				}
				if (d!=1){
					cout<<"similar"<<endl;
					continue;
				}
			}
		}
	}
	return 0;
}