MD5_SHIFT_43
II(c, d, a, b, x_14, MD5_SHIFT_43, MD5_CONST_e(50)); /* 51 */
II(c, d, a, b, x_10, MD5_SHIFT_43, MD5_CONST_e(54)); /* 55 */
II(c, d, a, b, x_6, MD5_SHIFT_43, MD5_CONST_e(58)); /* 59 */
II(c, d, a, b, x_2, MD5_SHIFT_43, MD5_CONST_e(62)); /* 63 */