word1#element1.1#element1.2#element1.3#...
word2#element2.1#element2.2#element2.3#...
...
...

...
word8#element8.1#element8.2#element8.3#...
word9#element9.1#element9.2#element9.3#...
...

...
word8#element8.1#element8.2#element8.3#...#element9.1#element9.2#element9.3#...
...

sed 'N;s/^([#]*)#([^n]*)n1/1#2/' database