Alien Breed 1

Level codes:
2 - AAJIHGDDC
3 - CGGHDGGDG
4 - HDICICCII
5 - IDHEHDGCC
6 - IJIIDIHEC
7 - CFDFEFEFJ
8 - JIIJIIIIC
9 - AAAABAAAA
10 - CCGDGBBBB
11 - HHIAAAJJIG
12 - GGDDJJHFD
13 - JIECBFGFF
14 - HGGEDDCCB
15 - HHHGFGDCC
16 - IHHDCHGHFF