-t
-f
{Botte/Anon.}
b

b
x     a
x     c
x     d
x    a
x    c
x    d
x   a
x   c
x  a
x  b
x  d
x a
x b
x d
xa
xc
xd
xc
xa
x d
x b
x a
x  d
x  b
x  a
x   c
x   a
x    d
x    c
x    a
x  a c
x    d
x   c
x  a c
x    a
x  a c
x   c a
x   c a
b
b
Q

e