Help me in solving LB17 problem

help
,
1

My issue

My code

# The code below is incorrect. Debug this code to solve the problem

import math
t = int(input())
for i in range(t):
    x,y = map(int,input().split())
    m = math.ceil(x//10)
    n = math.ceil(y//10)
    print(abs(m-n))

Learning course: Python for problem solving - 1
Problem Link: CodeChef: Practical coding for everyone