Кирилл Деменев

package com.company;

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

public class Main {
    public static void everything(String smth) {
        String n = "роман"; String n2 = "павел"; String n3 = "сникерс";
        StringBuilder str = new StringBuilder();
        String arr[] = smth.split(" ");
        for (int i = 0; i < arr.length; i++) {
            if (arr[i].equalsIgnoreCase(n) || arr[i].equalsIgnoreCase(n2) || arr[i].equalsIgnoreCase(n3)) {
                str.append(arr[i].toUpperCase());
                str.append(" ");
            }
            else {
                str.append(arr[i]);
                str.append(" ");
            }
        }
        System.out.print(str);
    }

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

        everything(str);
    }
}