#!/usr/bin/env python
# coding: utf-8
class Number:
  def __init__(self, start):
    self.data = start
  def __sub__(self,other):
    return Number(self.data - other)

4733c90aaf70ac3b02fc9e580b72389fb03a85c6
<mask token>

class Number:
    <mask token>
    <mask token>

class Number:

    def __init__(self, start):
        self.data = start
    <mask token>

class Number:

    def __init__(self, start):
        self.data = start

    def __sub__(self, other):
        return Number(self.data - other)

#!/usr/bin/env python
# coding: utf-8
class Number:
  def __init__(self, start):
    self.data = start
  def __sub__(self,other):
    return Number(self.data - other)
