#include<bits/stdc++.h>
using namespace  std;
int t;
string sa,sb; 
int  main( ) 
{
    cin>>t;
    while (t--)
    {
        cin>>sa>>sb;
        if (sa==sb)
        {
            cout<<"similar"<<endl;
            continue;
        }
        if (sa.size()<sb.size())swap(sa,sb);
        for (int i=0;i<sa.size();i++)
        {
            if (sa[i]!=sb[i])
            {
                string aq=sa.substr(0,i);
                string ah=sa.substr(i+1,sa.size()-1-(i+1)+1);
                if (aq+ah==sb || aq+sb[i]+ah==sb)
                {
                    cout<<"similar"<<endl;
                    break;
                }
                else
                {
                    cout<<"not similar"<<endl;
                    break;
                }
            }
        }
    }
    return 0;   
}