using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var s = "Иван Иванович носил кран";
var bukva = "н";
Console.WriteLine(Regex.Replace(s, $@"\s*\w*{bukva}\b", "").Trim());
}
}
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