def solve(self):
cycle = ["<STR_LIT>", "<STR_LIT>", "<STR_LIT>", "<STR_LIT>"]<EOL>combine = self.combine()<EOL>put = Formula(Step("<STR_LIT:y>") * cycle.index(self.pair) or [])<EOL>self.cube(put)<EOL>self.pair = "<STR_LIT>"<EOL>estimated = self.estimated_position()<EOL>for U_act in [Formula(), Formula("<STR_LIT>"), Formula("<STR_LIT>"), Formula("<STR_LIT>")]:<EOL><INDENT>self.cube(U_act)<EOL>for put_act in [Formula("<STR_LIT>"), Formula("<STR_LIT>"), Formula("<STR_LIT>"), <EOL>Formula("<STR_LIT>"), Formula("<STR_LIT>"), Formula("<STR_LIT>")]:<EOL><INDENT>self.cube(put_act)<EOL>if self.get_pair() == estimated:<EOL><INDENT>return combine + put + U_act + put_act<EOL><DEDENT>self.cube(put_act.reverse())<EOL><DEDENT>self.cube(U_act.reverse())<EOL><DEDENT>
Solve the pair.