Кирилл Деменев

package com.company;

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

public class Main {
    public static int everything(String st, char ch) {
        char[] cha = st.toCharArray();
        for (int i = 0; i < cha.length; i++) {
           if (cha[i] == ch) {
               return i;
           }
        }
        return -1;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        String st = in.next();
        char ch = in.next().toCharArray()[0];

        System.out.print(everything(st, ch));
    }
}