0 0 5 0 1 1 0 0

0 1 5 1 0 0 0 1

5 5 5 0 1 0 1 0

0 1 0 0 0 5 0 5

0 0 0 5 0 0 1 0

1 0 0 0 1 0 0 1

5 5 1 1 0 0 5 5

5 5 5 5 5 5 5 5

where 5’s stand the missing data.

a c n t c g g t

a t n a a a g g

n n n t c a c t

a t c t a n g n

a c c n a a c t

g c c t c a g g

n n g a a a n n

n n n n n n n n

where n’s stand the missing data.