import collections
def bf(s,lim=5000):
        s = filter(lambda x: x in "+-<>[].,",s)
        try:
                jmps = {}
                st = []
                for i,c in enumerate(s):
                        if c == '[':
                                st.append(i)
                        elif c == ']':
                                i2 = st.pop()
                                jmps[i] = i2
                                jmps[i2] = i
                if len(st) != 0:
                        return "!mail Failure fix pls: " + s
        except:
                return "!mail Techman it broken"
        l = len(s)
        ip = 0
        mem = collections.defaultdict(int)
        mp = 0
        out = ""
        for _ in xrange(lim):
                if ip >= l: break
                if s[ip] == '+':        mem[mp] += 1
                elif s[ip] == '-':      mem[mp] -= 1
                elif s[ip] == '<':      mp -= 1
                elif s[ip] == '>':      mp += 1
                elif s[ip] == '.':      out += chr(mem[mp] & 255)
                elif s[ip] == ',':      return out + "[I can't read chars in, sorry!]"
                elif s[ip] == ']':      ip = jmps[ip] - 1
                elif mem[mp] <= 0:      ip = jmps[ip]
                mem[mp] &= 255
                ip += 1
        return ">" + out.strip()