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#include<iostream>
#include<string>
using namespace std;
int main(){
    int i,j,k,l,m,result;
    cin>>m;
    string s,t;
    for(i=0;i<m;i++){
        result=0;
        cin>>s>>t;
        int *next=new int[s.length()+1];
        next[0]=-1;
        k=-1;
        j=0;
        while(j<s.length()){
            if(k==-1||s[j]==s[k]){
                k++;
                j++;
                next[j]=k;
            }else{
                k=next[k];
            }
        }
        j=0;
        k=0;
        while(j<t.length()){
            if(k==-1||t[j]==s[k]){
                j++;
                k++;
            }else{
                k=next[k];
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