Please use Java

In cryptarithmetic puzzles, mathematical equations are written using letters. Each letter can be a digit from 0 to 9, but no two letters can be the same. Here is a sample problen: SEND + MORE MONEY A solution to the puzzle is S 9, D -7. Write a program that finds a solution to the cryptarithmetic puzzle of the following TOO + TOO + TOO + TOO = GOOD R= 8, O = 0, M 1, Y = 2, E = 5, N = 6, The simplest technique is to use a nested loop for each unique letter (in this case T, O, G, D). The loops would systematically assign the digits from 0 to 9 to each letter. For example, it might first try T-0, 0 0, G 0, D 0, then T-0, O-0, G=0, D=1,then T = 0,0=0, G=0, D = 2, etc., up to T = 9, O = 9, G=9, D = 9, In the loop body, test that each variable is unique and that the equation is satisfied. Output the values for the letters that satisfy the equation