B

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n, m;
    string s, t;
    cin>>n>>m>>s>>t;

    int x = (t.substr(0, n)==s);
    int y = 2*(t.substr(m-n, n)==s);

    if(x+y == 3)        x=0, y=0;
    else if(x+y == 0)        x=3, y=0;

    cout<<x+y<<"\n";
}