using System.Collections.Generic;
public static void Main()
var Answer = "17519, , , ,A,B,D,A,D,B,A,C,B,A,C,D,B,D,B,D,D,B,A,D,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B".Split(',').ToArray();
var Quiz = "17519,Test,Person,middle,x,A,B,A,D,B,A,C,B,B,C,D,B,D,B,D,D,B,A,B,D,B,B,A,B,A,D,C,B,C,C,B,A,A,C,A,D,B,C,C,A,D,A,D,A,B,B,B,A,B".Split(',').ToArray();
List<string> differentvalues = Answer.Select((item, index) => new { item, index })
.Where(x => x.item != Quiz[x.index])
.Select(x => String.Format("{0}{1},", x.index, Quiz[x.index].ToLower()))
differentvalues.RemoveRange(0, 3);
foreach(string item in differentvalues)