Formula for B3.
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=LEFT(A3,LEN(A3)-LEN(C3)-1)


Formula for C3 entered using Ctrl Shift Enter

Formula: copy to clipboard
=RIGHT(A3, LEN(A3)-MAX(IF(ISNUMBER(VALUE(MID(A3,ROW(INDIRECT("1:" & LEN(A3))),1))),ROW(INDIRECT("1:" & LEN(A3)))))-1)


Then fill down.