20分求条

#include<bits/stdc++.h>
using namespace std;
int t;
signed main(){
	cin>>t;
	while(t--){
		string s1,s2;
		cin>>s1>>s2;
		if(s1.size()<s2.size()){
			swap(s1,s2);
		}
		if(s1.size()-s2.size()>1){
			cout<<"not similar";
			continue;
		}
		if(s1.size()-s2.size()==1){
			int ans=0,f=0;
			for(int i=0;i<s2.size();i++){
				if(s1[i+ans]!=s2[i]) ans=1;
				if(ans==1&&s1[i+ans]!=s2[i]){
					cout<<"not similar\n";
					f=1;
					break;
				}
			}
			if(f==0) cout<<"similar\n";
		}
		if(s1.size()==s2.size()){
			int ans=0,f=0;
			for(int i=0;i<s1.size();i++){
				if(s1[i]!=s2[i]) ans++;
			}
			if(ans==1||ans==0){
				cout<<"similar\n";
			}else{
				cout<<"not similar\n";
			}
		}
	}
	return 0;
}