tek -n < $1;
acyc < $1 |tee $1.A | uscale | tek -n;
layer < $1.A |tee $1.B | uscale | tek -n;
proper < $1.B |tee $1.C | uscale | tek -n -d;
untangle < $1.C |tee $1.D | uscale | tek -n -d;
revrev < $1.D | tee $1.E | uscale | tek -n;
delstrdum < $1.E |tee $1.F | uscale | tek -n
