using System;
using System.Text.RegularExpressions;
public class Test
{
    public static void Main()
    {
        string pattern = @"[a-zA-Z\/]+";
        string input = @"...
1.1SMITH/JOHN 2.1SMITH/SARA
...
1.1Parker/Sara/Amanda.CH07/Elizabeth.IN03";

        foreach (Match m in Regex.Matches(input, pattern))
        {
            Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
        }
    }
}