Code triple sum challenge in GUI pls. java language

Given 3 arrays a, b, c of different sizes, find the number of distinct triplets (p, q, r) where p is an elemen pea, q Eb, and re csatisfying the criteria: p r. For example, given a = [3,5,7), b =(3, 6), and c= [4, 6, 9). we find four distinct triplets: (3, 6, 4), (3,6,6), (5,6,4),(5, 6, 6). Function Description Complete the triplets function in the editor below. It must return the number of distinct triplets that can be given arrays. triplets has the following parameter(s): a,b,c three arrays of integers. Input Format The first line contains 3 integers lena, lend, and lenc, the sizes of the three arrays. The next 3 lines contain space-separated integers numbering lena, lenb, and lenc respectively. Constraints 1