import sys, urllib.request

class Brainfuck(object):
        def __init__(self):
                self.memory = [0] * 30000
                self.pointer = 0
                self.ip = 0
                self.ret = ""
                self.safety_net = 0

        def modify(self, value):
                self.memory[self.pointer] = (self.memory[self.pointer]+value) & 0xff

        def move(self, direction):
                self.pointer += direction

        def jump(self, where):
                if self.memory[self.pointer] == 0 or where < self.ip:
                        self.ip = where - 1

        def incP(self):
                if self.iX and self.inp != "":
                        self.memory[self.pointer] = ord(self.inp[0])
                        self.inp = self.inp[1:]
                elif self.iX and self.inp == "":
                        self.memory[self.pointer] = 0

        def adR(self, chrr):
                self.ret += chrr

        def prepare(self, code):
                instructions = []
                jump_targets = []

                instr = {
                        '+': lambda: self.modify(+1),
                        '-': lambda: self.modify(-1),
                        '>': lambda: self.move(+1),
                        '<': lambda: self.move(-1),
                        '.': lambda: self.adR(chr(self.memory[self.pointer])),
                        ',': lambda: self.incP(),
                        '[': lambda: self.jump(jump_targets[self.ip]),
                        ']': lambda: self.jump(jump_targets[self.ip])
                }

                stack = []
                for c in (c for c in code if c in instr):
                        jump_targets.append(None)
                        instructions.append(instr[c])

                        if c == '[':
                                stack.append(len(instructions)-1)

                        if c == ']':
                                begin = stack.pop()
                                jump_targets[-1] = begin
                                jump_targets[begin] = len(jump_targets)

                return instructions

        def run(self, code, inpp=""):
                if code[:4] == "http":
                        code = urllib.request.urlopen(code).read().decode("utf-8")


                instructions = self.prepare(code)
                self.inp = inpp
                self.iX = True
                if inpp == "": self.iX = False

                while self.ip < len(instructions):
                        print(code[self.ip])
                        instructions[self.ip]()
                        self.ip += 1
                        self.safety_net += 1
                        if self.safety_net > 10000: break

                print(self.ret)
                return self.ret