Write this program in C++

Input Input a poset , Al,. Every two adjacent ordered pairs are separated by a comma Output Output all minimal elements and all maximal elements of A. The first line outputs all minimal elements, in the natural order of English letters, with a comma between any two adjacent elements. The second line outputs all maximal elements, in the natural order of English letters, with a comma between any two adjacent elements. Test Input Expected Output Time limitation Memory limitation Extra process number Test Case 1 1 seconds 256M 0 View plain a,b,c,de 2. , View plain 1. a,ce 2. b,de