 
 <prompt> Wetin you need to sabi about group by na how dem present am. <response>: "Quotient groups and subgroups dey work together to describe every group by how e dey present: any group na the quotient of the free group over the generators of the group, divided by the subgroup of relations. For example, the dihedral group D4 fit be generated by two elements r and f (for example, r = r1, the right rotation and f = fv the vertical (or any other) reflection), which mean say every symmetry of the square na finite composition of these two symmetries or their inverses. Together with the relations" 