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 = "(AvgC20.1 > 980000) && (C1>C2) MaxC20 MinC20.14";
    	var pattern = @"(?n)(Avg|Max|Min)[OHLVC]\d+(\.\d+)?";
    	var result = Regex.Matches(s, pattern)
    		.Cast<Match>()
    		.Select(p => p.Value)
    		.ToList();
        foreach (var r in result)
        	Console.WriteLine(r);
	}
}