C# Regular Expression - Extracting the number of month or year from codes

I would like only one regular expression to extract the number of days, weeks, months and/or years from the following codes:

AB7YT1M=ABC       ==> 7Y1M

AB10YT1M=ABC      ==> 10Y1M

AB30YT1M=ABC      ==> 30Y1M

ABCDEF1Y1M=A      ==> 1Y1M

ABCDEF34Y6M=A     ==> 34Y6M

ABCDEF7M=A        ==> 7M

ABCDEF1D=A      ==> 1D


@"(\d+[DWMY])(?!\w+(1))(\d+[DWMY])(?!\w+(1))|(\d+[DWMY])(?!\w+(1))"

This code does not support e.g. 30YT1M

Could someone please help find an appropriate regexp for me?