Solution-CF265-D2-A

#include <iostream>

using namespace std;

int main()
{
    string instructStones;
    string stonePos;
    cin>>stonePos;
    cin>>instructStones;
    int posValue=0;
    char startPos=stonePos[posValue];
    char currentPos=startPos;
    for(int index1=0;index1<instructStones.length();index1++){
        if(instructStones[index1]==currentPos){
            posValue++;
            currentPos=stonePos[posValue];
        }
    }
    cout<<posValue+1<<endl;
    return 0;
}