For example, water (HO) which has the C symmetry described above. The 2"p" orbital of oxygen is oriented perpendicular to the plane of the molecule and switches sign with a C and a σ'(yz) operation, but remains unchanged with the other two operations (obviously, the character for the identity operation is always +1). This orbital's character set is thus {1, -1, 1, -1}, corresponding to the B irreducible representation. Similarly, the 2"p" orbital is seen to have the symmetry of the A irreducible representation, 2"p" B, and the 3"d" orbital A. These assignments and others are in the rightmost two columns of the table.