Hi Linlin, It's been awhile LOL! I really like your solution; however, in reality Q1-Q3 looks more like: CKD001CA CKD004DB CKD005DB CKD020CA CKD021CA CKD022DT CKD023DT CKD049CA CKD050CA CKD056CA Not sure how to create the index. Any suggestions? Thanks! Caroline
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