in separate cells then in g1 filled acros to l1
=LOOKUP(A1,{1,11,21,31,41,51},{"A","B","C","D","E","F"})
in one cell in same order as numbers
=LOOKUP($A1,{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP($B1,{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP($C1,{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP($D1,{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP($E1,{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP($F1,{1,11,21,31,41,51},{"A","B","C","D","E","F"})
in one cell sorted
=LOOKUP(SMALL($A1:$F1,1),{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP(SMALL($A1:$F1,2),{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP(SMALL($A1:$F1,3),{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP(SMALL($A1:$F1,4),{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP(SMALL($A1:$F1,5),{1,11,21,31,41,51},{"A","B","C","D","E","F"})&" "&LOOKUP(SMALL($A1:$F1,6),{1,11,21,31,41,51},{"A","B","C","D","E","F"})
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