Write a java program that prompts the user to enter an integer and then displays the digits whose frequencies is equal to the one of its digits. If none of the digits has a frequency equal to the one of its digits the program should display your Student ID number.

Example$1$:

Input : $21676$

Output: $2167$

Because $6$ appeared twice which is equal to the leftmost digit.$(21676)$

And $217$ appeared once which is equal to the one $(21676)$

Example$2$:

Input: $345644$

Output: $4$ because $4$ appeared three times which is equal to the leftmost digit$(345644).$

Example$2$:

Input: $8924937$

Output:$9$ because $9$ appeared twice times which is equal to the two digit$(8924937).$