using System;
using System.Linq;
public class Test
{
public static void Main()
{
var matchterm = "VO";
var text = "FOR OVER FIFTY YEARS WATER FUTURE VOA VO>> VO";
var res = text.Split()
.Where(p => String.Compare(p, matchterm, StringComparison.OrdinalIgnoreCase) == 0)
.ToList();
Console.WriteLine(string.Join("; ", res));
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uTGlucTsKcHVibGljIGNsYXNzIFRlc3QKewoJcHVibGljIHN0YXRpYyB2b2lkIE1haW4oKQoJewoJCXZhciBtYXRjaHRlcm0gPSAiVk8iOwoJCXZhciB0ZXh0ID0gIkZPUiBPVkVSIEZJRlRZIFlFQVJTIFdBVEVSIEZVVFVSRSBWT0EgVk8+PiBWTyI7CgkJdmFyIHJlcyA9IHRleHQuU3BsaXQoKQoJCQkuV2hlcmUocCA9PiBTdHJpbmcuQ29tcGFyZShwLCBtYXRjaHRlcm0sIFN0cmluZ0NvbXBhcmlzb24uT3JkaW5hbElnbm9yZUNhc2UpID09IDApCgkJCS5Ub0xpc3QoKTsKCQlDb25zb2xlLldyaXRlTGluZShzdHJpbmcuSm9pbigiOyAiLCByZXMpKTsKCX0KfQ==