"""
This program is a BrainF**k interpreter.
Copyright (C) 2004  John Bauman

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
"""

import fileinput
import psyco
import msvcrt
import sys

psyco.full()

program = ""


for line in fileinput.input():
    program += (line)
    
currloc = 0
memory = [0]
memptr = 0
stack = []

while True:
    #print currloc
    pch = program[currloc]
    if pch == "+":
        memory[memptr] += 1
    if pch == "-":
        memory[memptr] -= 1
    if pch == ">":
        memptr += 1
        if memptr >= len(memory):
            memory.extend([0] * 10)
    if pch == "<":
        memptr -= 1
        if memptr < 0:
            print "Memory pointer toofar left!"
    if pch == "[":
        if memory[memptr] != 0:
            stack.append(currloc)
        else:
            stackp = 1
            while stackp > 0:
                currloc += 1
                if program[currloc] == "[":
                    stackp += 1
                if program[currloc] == "]":
                    stackp -= 1
    if pch == "]":
        if memory[memptr] != 0:
            currloc = stack[-1]
        else:
            stack.pop()
    if pch == ",":
        val = msvcrt.getche()
        if ord(val) == 3:
            break
        memory[memptr] = ord(val)
    if pch == ".":
        sys.stdout.write(chr(memory[memptr]))
    
    currloc += 1
    if currloc >= len(program):
        break