Competitions

# 9 Round Spiral. Round 1. Step 9.

# Subtraction

Find the difference of two nonnegative integers **a** and **b**.

#### Input

Two nonnegative integers **a** and **b** (**b** ≤ **a** ≤ `10`

), each in the separate line.^{10000}

#### Output

Print the difference between **a** and **b**.

Input example #1

5 3

Output example #1

2