b42, c56, a14, a23, a25, a31, a34, a42, a45, a51, a53, b12, b14, b23, b25, b31, b34, b45, b51, b53, c12, c14, c16, c23, c25, c31, c34, c36, c42, c45, c51, c53, c62, c64, a12