using a string for seq alphabets
using a string for seq alphabets


Former-commit-id: 4fa78469a57ba4342ba7447b292e9dbf32031d3e [formerly 8e04eaaa74782150aa011db7cca5f6c801e610ce]
Former-commit-id: 8b6817fc7b9566c80c999d4f9d8bbbf5240a304d
simomarsili/elss