// javac Rock.java
// java Rock

import java.io.*;  

public class Rock
{ 
static char ComputerAnswer() throws Exception
  {  
   int Comp_Ans = (int)(3 * Math.random());
   
   char ReVal = 0;

   if (Comp_Ans == 0)
     ReVal = 'R';
   if (Comp_Ans == 1)
     ReVal = 'P';
   if (Comp_Ans == 2)
     ReVal = 'S';
   return ReVal;
  } // close value returning method ComputerAnswer


static char HumanAnswer() throws Exception  
  {    
    BufferedReader cin;
    cin = new BufferedReader(new InputStreamReader(System.in)); 

    char Hum_Ans;

  while(true)
    {
    System.out.print("Choose: [Rock,Paper,Scissors,Quit (i.e. R, P, S, Q)]: ");
    Hum_Ans = cin.readLine().charAt(0);

    return Hum_Ans;
    }
  } // close value returning method HumanAnswer 


static void PrintMethod(char method1, char method2) throws Exception  
  { 
   if (method1 == 'P' && method2 == 'R')
    System.out.println("Computer:" + method1 + ", " + "Human:" + method2 + ", " + "Computer wins");

   if (method1 == 'P' && method2 == 'S')
    System.out.println("Computer:" + method1 + ", " + "Human:" + method2 + ", " + "Human wins");

   if (method1 == 'S' && method2 == 'P')
    System.out.println("Computer:" + method1 + ", " + "Human:" + method2 + ", " + "Computer wins");

   if (method1 == 'S' && method2 == 'R')
    System.out.println("Computer:" + method1 + ", " + "Human:" + method2 + ", " + "Human wins");

   if (method1 == 'R' && method2 == 'S')
    System.out.println("Computer:" + method1 + ", " + "Human:" + method2 + ", " + "Computer wins");

   if (method1 == 'R' && method2 == 'P')
    System.out.println("Computer:" + method1 + ", " + "Human:" + method2 + ", " + "Human wins");

   if (method1 == method2)
    System.out.println("Computer:" + method1 + ", " + "Human:" + method2 + ", " + "tie");

  }// closes method PrintMethod

  public static void main(String[] argv) throws Exception
   {
// declare variables
    
    char HumAns;
    char CompAns;

  // start loop
    while (true)
      {
    // determine computer's choice
  
      CompAns = ComputerAnswer();   
        
    // prompt for, and read, the human's choice
      HumAns = HumanAnswer();

    // if human wants to quit, break out of loop

     if (HumAns == 'Q' || HumAns == 'q') 
          {
           System.exit(0);
           break;
          }

    // print results
     else
        {
       PrintMethod(CompAns, HumAns);
        }  
  // end loop
      }//while
// end program

   }//main

}//public class