b[o] = ".,-~:;=!*#$@" [N > 0 ? N : 0]

def trans(code):
        b = ""
        code = code.replace("[", "").replace("]", "")
        code = code.split(",")
        for i in range(len(code)):
            code[i] = code[i].strip()
            code[i] = code[i].split(" ")
            code[i][0] = code[i][0].strip()
            code[i][1] = code[i][1].strip()
            b += code[i][0] * int(code[i][1])
        return b