DEF SRLAT
    PORT IN S
    PORT IN R
    PORT OUT QT
    PORT OUT QC

    NET SN
    NET RN

    INST NOT1 NAND S S SN
    INST NOT2 NAND R R RN
    INST NAND1 NAND SN QC QT
    INST NAND2 NAND QT RN QC
ENDDEF