Regex expression fucntion

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C#

regular-expression

I have the following input string:
+20A, 100A, E+40, 100+, RK100H

I would like to extract the output below from the input:
+20A, E+40, 100+

My current function is only outputting E+20 string but not the +20A string.

foreach (var match in Regex.Matches(list, @"[a-zA-z]+\+\d+"))
                                 {
                                     // Output each match here
                                     string b = "";
                                     b += match.ToString();
                                     row["Spre"] = b;
                                     row["Spre Value"] = value;
                                     row[6] = x;
                                 }

Is there something I am missing from my expression? Thanks