Try this formula.....
=RIGHT(INDEX(Sheet1!$H$4:$H$90000,MAX(IF(IF(Sheet1!$H$4:$H$90000<>"",LEFT(Sheet1!$H$4:$H$90000,4)*1)=MAX(IF(Sheet1!$H$4:$H$90000<>"",LEFT(Sheet1!$H$4:$H$90000,4)*1)),IF(Sheet1!$J$4:$J$90000="committed",ROW(Sheet1!$H$4:$H$90000)-ROW(Sheet1!$H$4)+1)))),2)
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