User Manual
63
•RECUR
3
1
a •b a
n
a
n
a
n
b
n
b
n
b
n
2
b •c b
n
b
n
b
n
c
n
c
n
c
n
3
a •c a
n
a
n
a
n
c
n
c
n
c
n
•Σ
3
1
a
n
6Σ
a
n
•Σ RECUR
3
1
a •b a
n
a
n
a
n
b
n
b
n
b
n
2
b •c b
n
b
n
b
n
c
n
c
n
c
n
3
a •c a
n
a
n
a
n
c
n
c
n
c
n
4Σ
a •b a
n
a
n
a
n
b
n
b
n
b
n
5Σ
b •c b
n
b
n
b
n
c
n
c
n
c
n
6Σ
a •c a
n
a
n
a
n
c
n
c
n
c
n










