__author__ = 'bailey'


class NotFoundException(Exception) :
    def __init__(self, value):
        self.value = value
    def __str__(self):
        return repr(self.value)

class AtFrontException(Exception) :
    def __init__(self, value):
        self.value = value
    def __str__(self):
        return repr(self.value)

class EmptyException(Exception) :
    def __init__(self, value):
        self.value = value
    def __str__(self):
        return repr(self.value)