Given a number and a digit on one line, insert the digit into the number in front of the first digit in the number that is less than the given digit. For example:

If given $65432$ and $3$ as inputs, the $3$ would be inserted after the $4$ in the number, to create the new number: $654332.$

The first $($and only$)$ line of input contains $n,$ the string representation of the number and $d,$ the digit to insert. It is guaranteed that $n$ will not have any leading zeros.

Output the largest number that can be created by inserting $d$ into $n.$ Write the code in python pls$.$