lower

I would like to locate/organize my valid agency IDs (agencyid). agencyid CA0006 TN0106 NY0009 LA0035 TN0105 TN01o CA0017 cA0006 La0035 The correct structure of the agency ID should be the state letters = 4 numbers ex,. (NY1111)The first thing I wanted to do is to make the first two letter of...