Order two Strings X95093

Write a program that reads several pairs of strings, and prints each pair in lexicographic order.

Recall that the comparison operator $<$ in Python is defined for strings as the lexicographic order, that is, the expression $s<t$ evaluates to True if $s$ is lexicographically smaller than $t$.

Input

The input has several cases, each consisting of a pair of strings $s$ and $t$.

Output

For each case, you have to write a line with $s$ and $t$ in lexicographical order, separated by a whitespace