    CLASS_A, /* dest:4, src1:4, src2:7 */
    CLASS_B, /* dest:4, src1:11        */
    CLASS_C, /* ccdest:4, src1:4, src2:7 */
    CLASS_D,
    CLASS_E, /* ccdest:4, ccsrc1:4, ccsrc2:7 */
    CLASS_F, /* dest:4                       */
    CLASS_G, /* src1:18                      */
    CLASS_H,
    CLASS_I,
    CLASS_J,
    CLASS_K,
    CLASS_AMBIG_JG,
    CLASS_AMBIG_AB,
    CLASS_AMBIG_CDEFHI,
    CLASS_AMBIG_CH,
    CLASS_AMBIG_CHI,
    CLASS_UNKNOWN

