DEF TRUTH_TABLE3
    PORT IN A
    PORT IN B
    PORT IN C
    PORT IN D
    PORT OUT Z

    NET E
    NET F
    NET G
    NET H

    INST NAND1 NAND C D E
    INST NAND2 NAND B E F
    INST NAND3 NAND D E G
    INST NAND4 NAND A G H
    INST NAND5 NAND F H Z

ENDDEF