Кирилл Деменев

package com.company;

import java.util.Scanner;
import java.util.Random;

public class Main {
    public static int everything(String smth, String smth2) {
        int k = 0;
        StringBuilder str = new StringBuilder();
        str.append(smth);
        StringBuilder str2 = new StringBuilder();
        str2.append(smth2);
        for (int i = 0; i < str.length(); i++) {
            if (smth.charAt(i) == smth2.charAt(0)) {
                for (int j = 0; j < str2.length(); j++) {
                    if (smth.charAt(i) == smth2.charAt(j)) {

                    }
                    else {
                        break;
                    }
                    k++;
                }
            }
        }
        return k;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String str = in.nextLine();
        String str2 = in.nextLine();
        System.out.println(everything(str, str2));
    }
}