import os
import sys

# -*- coding: iso-8859-1 -*-
class _Getch:
    def __init__(self):
        try:
            self.impl = _GetchWindows()
        except ImportError:
            self.impl = _GetchUnix()

    def __call__(self): return self.impl()

class _GetchUnix:
    def __init__(self):
        import tty, sys

    def __call__(self):
        import sys, tty, termios
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr(fd)
        try:
            tty.setraw(sys.stdin.fileno())
            ch = sys.stdin.read(1)
        finally:
            termios.tcsetattr(fd,termios.TCSADRAIN,old_settings)
        return ch
        
class _GetchWindows:
    def __init__(self):
        import msvcrt
        
    def __call__(self):
        import msvcrt
        return msvcrt.getch()

def print_there(x, y, text):
     print("\33[%d;%df%s\x1b8" % (x, y, text))
        
getch = _Getch()

char = getch()
#113 q
x = 0
y = 0
while ord(char) != 113:
    #print(ord(char))
    os.system('cls')
    if ord(char) == 75:
        print_there(x, y, 'O')
        if(x > 0):
            x -= 1
    if ord(char) == 77:
        print_there(x, y, 'O')
        if(x < 100):
            x += 1
    if ord(char) == 72:
        print_there(x, y, 'O')
        if(y > 0):
            y -= 1
    if ord(char) == 80:
        print_there(x, y, 'O')
        if(y < 100):
            y += 1 
    char = getch()