L^(1) =
       0    3    8  inf   -4
     inf    0  inf    1    7
     inf    4    0  inf  inf
       2  inf   -5    0  inf
     inf  inf  inf    6    0

L^(2) =
       0    3    8    2   -4
       3    0   -4    1    7
     inf    4    0    5   11
       2   -1   -5    0   -2
       8  inf    1    6    0

L^(3) =
       0    3   -3    2   -4
       3    0   -4    1   -1
       7    4    0    5   11
       2   -1   -5    0   -2
       8    5    1    6    0

L^(4) =
       0    1   -3    2   -4
       3    0   -4    1   -1
       7    4    0    5    3
       2   -1   -5    0   -2
       8    5    1    6    0

L^(5) =
       0    1   -3    2   -4
       3    0   -4    1   -1
       7    4    0    5    3
       2   -1   -5    0   -2
       8    5    1    6    0

L^(5) equals L^(4)? yes
