Excel 2016 has CONCAT so (you may need to Ctrl+Shift+Enter this to ommit it to the sheet):
=CONCAT(IF(ISNUMBER(FIND({0,1,2,3,4,5,6,7,8,9},CONCAT(B11))),{0,1,2,3,4,5,6,7,8,9},""))
or for a range (it's the same):
=CONCAT(IF(ISNUMBER(FIND({0,1,2,3,4,5,6,7,8,9},CONCAT(B22:B26))),{0,1,2,3,4,5,6,7,8,9},""))
edit post posting: Ha, beaten to it!
Note also the inclusion of zero in mine.