public static void Main()
Console.WriteLine("DQ, ERR, MCL, NCH, OSCR, PAID, PREQ".Contains("DQ"));
Console.WriteLine("DQ, ERR, MCL, NCH, OSCR, PAID, PREQ".Contains("ENC"));
Console.WriteLine("ENC".Contains("DQ, ERR, MCL, NCH, OSCR, PAID, PREQ"));
Console.WriteLine("DQ".Contains("DQ, ERR, MCL, NCH, OSCR, PAID, PREQ"));