#/\---Insert mux21 ---
DEF MUX41
    PORT IN I0
    PORT IN I1
    PORT IN I2
    PORT IN I3
    PORT IN S<1:0>
    PORT OUT Z

    NET A1
    NET B1
    NET C1
    NET Z1

    NET B2
    NET C2
    NET Z2

    NET A3
    NET B3
    NET C3

    #/\---INST MUX0 MUX21 I0 I1 S<0> A
    INST NAND11 NAND S<0>  S<0>  A1
    INST NAND12 NAND S<0>  I1    B1
    INST NAND13 NAND I0    A1    C1
    INST NAND14 NAND B1    C1    Z1

    #/\---INST MUX1 MUX21 I2 I3 S<0> B
    #/\---INST NAND1 NAND S<0>  S<0>  A2 kommt von MUX0
    INST NAND22 NAND S<0>  I3    B2
    INST NAND23 NAND I2    A1    C2
    INST NAND24 NAND B2    C2    Z2

    #/\---INST MUX2 MUX21 A  B  S<1> Z
    INST NAND31 NAND S<1>  S<1>  A3
    INST NAND32 NAND S<1>  Z2    B3
    INST NAND33 NAND Z1    A3    C3
    INST NAND34 NAND B3    C3    Z
ENDDEF