For a given natural number M, find all continuous natural number segments (continuous number is greater than 1), the sum of all the continuous natural number segments is M.

Example: 1998+1999+2000+2001+2002 =10000, so a natural number segment from 1998 to 2002 is a solution to M=10000.

A single line containing an integer gives the value of M (10 <= M <= 2,000,000)

Each line has two natural Numbers. The first and last Numbers in a continuous natural number segment satisfying the condition are given. The two Numbers are separated by a space.

Simple arithmetic