input13)
connect(sc2.output21, sc1.input21)
connect(sc2.output23, sc3.input23)
connect(sc2.output24, sc4.input24)
connect(sc3.output32, sc2.input32)
connect(sc3.output34, sc4.input34)
connect(sc4.output41, sc1.input41)
connect(sc4.output42, sc2.input42)


end SysArch;

2.
block SysArch  //  System Architecture

SC1 sc1
SC2 sc2
SC3 sc3
SC4 sc4

connect(sc1.output13, sc3.input13)
connect(sc2.output21, sc1.input21)
connect(sc2.output23, sc3.input23)
connect(sc2.output24, sc4.input24)
connect(sc3.output31, sc1.input31)
connect(sc4.output41, sc1.input41)
connect(sc4.output42, sc2.input42)
connect(sc4.output43, sc3.input43)


end SysArch;

3.
block SysArch  //  System Architecture

SC1 sc1
SC2 sc2
SC3 sc3
SC4 sc4

connect(sc1.output13, sc3.input13)
connect(sc2.output21, sc1.input21)
connect(sc2.output24, sc4.input24)
connect(sc3.output32, sc2.input32)
connect(sc4.output41, sc1.input41)
connect(sc4.output43, sc3.input43)


end SysArch;