nl_tokens: Parity of the edges permutation . Parity of corners and edges are the same if the cube is solvable .
pl_tokens: function ( ) { var i , j , m , o , ref , ref1 , ref2 , ref3 , s ; s = 0 ; for ( i = m = ref = BR , ref1 = UR + 1 ; ( <mask> <= ref1 ? m <= ref1 : m >= ref1 ) ; i = ref <= ref1 ? ++ m : -- m ) { for ( j = o = ref2 = i - 1 , ref3 = UR ; ( ref2 <= ref3 ? o <= ref3 : o >= ref3 ) ; j = ref2 <= ref3 ? ++ o : -- o ) { if ( this . ep [ j ] > this . ep [ i ] ) { s ++ ; } } } return s % 2 ; }