SYM  #buf1
BB(0,15,35,35)
TITLE 15 25  #1
DATE 13.10.1999
MODEL 111
VIS 4
REC(0,15,0,0,PO)
PIN(0,25,0,0)in
PIN(35,25,2.0,-5.0)out
LIG(0,25,10,25)
LIG(10,15,10,35)
LIG(10,35,25,35)
LIG(25,35,25,15)
LIG(25,15,10,15)
LIG(25,25,35,25)
VLG buf buf1(out,in);
FSYM