#! /usr/bin/python

class MyNumber:
    def __init__(self, n):
        self.value = n

    def even_or_odd(self):
        if self.value % 2 == 1:
            print self.value, ' is odd.'
        else:
            print self.value, ' is even.'

    def increment(self):
        self.value = self.value + 1


x = MyNumber(31)
x.even_or_odd()

y = MyNumber(106)
y.even_or_odd()

y.increment()
y.even_or_odd()