specs for FindFirst

Write a public class call FindFirst with a main method. what it does: 0. prompt user for a String 1. read a String from the user 2. print the character in the string with the lowest unicode 3. continue until user enters the string 0 Restrictions: do not use Arrays, do not use StringBuilder, do not use anything we haven't covered in class. 

Examples

% java FindFirst enter a string (end with 0): ksjdhfasksjsh first: a enter a string (end with 0): ksdjdhfgKKFHDFGASDJSDHsjsdhjasjhdsj first: A enter a string (end with 0): ksdjSJDJH5867SDJHDHdkjhd first: 5 enter a string (end with 0): ksjdhfgSDKSDH38475638*&^%$#sjdhsdgaA first: # enter a string (end with 0): 0 % java FindFirst enter a string (end with 0): 0 %