Offline$-1$ for A$2,$ B$2,$ C$2$

Problem $1$

Description

Given four digits in any number system, show the minimum four$-$digit number that can be

constructed with them.

Input$/$Output Format

The first line of input contains an integer b$,$ denoting the base of the number system. The next

line contains four space$-$separated characters denoting the digits in the b$-$based number

system.

Print a single line indicating the minimum four$-$digit number, in the b$-$based number system,

that can be constructed with the given digits.

You can safely assume that no input will violate the following constraints:

$2<=$ b $<=30,$ all the digits will be valid in the b$-$based number system $($for example, in a

$20-$based number system the digits can be $0-9$ and A$-$J $($uppercase only$).$