18 lines
193 B
Plaintext
18 lines
193 B
Plaintext
path(a, a).
|
|
path(a, d).
|
|
path(a, c).
|
|
path(a, b).
|
|
path(b, b).
|
|
path(b, a).
|
|
path(b, d).
|
|
path(b, c).
|
|
path(c, c).
|
|
path(c, b).
|
|
path(c, a).
|
|
path(c, d).
|
|
path(d, d).
|
|
path(d, c).
|
|
path(d, b).
|
|
path(d, a).
|
|
|