Permutations For BBFLU

Here are all the permutations for the letters BBFLU.

bflu bful blfu bluf bufl bulf bflu bful blfu bluf bufl bulf fblu fbul fblu fbul flbu flbu fubl fubl lbfu lbuf lbfu lbuf lfbu lfbu lubf lubf ubfl ublf ubfl ublf ufbl ufbl ulbf ulbf