NAME

       rubiks_optimal - optimal solver for 3x3x3 Rubik's cube

SYNOPSIS

       rubiks_optimal

DESCRIPTION

       Solves a 3x3x3 Rubik's cube, entered at a prompt.

CUBE FORMAT

       A solved cube is represented as

            UF UR UB UL DF DR DB DL FR FL BR BL UFR URB UBL ULF DRF DFL DLB DBR

       where  U,D,F,B,L,R  stand for up,down,front,back,left,right and the two-colored cubies are
       listed before the three-colored corner cubies.

       To input a scrambled cube, first give the cubie that's in  the   UF   location,  then  the
       cubie  in  the   UR   location,  and so forth, according to this list above.  For example,
       "cube in a cube" would be

            UF UR RD RB LU LF DB DL FR UB DF BL UFR RFD RDB RBU LFU LUB DLB LDF

       This input should all be on one line.