#include<bits/stdc++.h>
using namespace std;
int t,la,lb;
string a,b;
bool check(){
	bool f=0;
	for(int i=0;i<min(la,lb);i++){
		if(la!=lb&&a[i]!=b[i])
			if(a[i+1]!=b[i]&&a[i]!=b[i+1])return 0;
		if(f==1&&a[i]!=b[i])return 0;
	}
	return 1;
}
int main(){
	ios::sync_with_stdio(0);
	cin>>t;
	while(t--){
		cin>>a>>b;
		la=a.size(),lb=b.size();
		if(check())cout<<"similar\n";
		else cout<<"not similar\n";
	}
	return 0;
}