• First line contains the number N of sequences and their length L separated by at least one space.
• Next N lines contain a sequence label (at most 100 characters) followed by at least one space or tab followed by the sequence characters (and possibly spaces).
• Allowed sequence characters are IUPAC codes with gaps as - or ? (dna) and *, - or ? (protein) and are not case-sensitive.
• The format can also be interleaved as in the example below.

 8 90 

Nicotiana    gttggattca aagctggtgt taaagagtac aaattgactt attatactcc
Galphimia    gttggattca aggctggtgt taaagattat aaattgactt actatactcc
Oenothera    gttggattca aagccggcgt taaagattat aaattgactt attatactcc
Victoria     gttggattca aagctggtgt taaagattac agattgactt attacactcc
Cypirapea    ?????????? ????????gt taaagattac aaattgactt attatactcc
Barclaya     gttggattca aagctggtgt taaagattac agattgactt attacactcc
Petunia      gttggattca aagctggtgt taaagagtac aagttgactt attatactcc
Lycopersi    gttggattca aagctggtgt taaagagtac aaattgactt attatactcc


             tgagtaccaa accaaggata ctgatatatt ggcagcattc 
             tgactatgga accaaagata ctgatatctt ggcagcattc 
             tgaatacgaa accaaagata ctgatatctt ggcagcattc 
             tgattatgaa acccttgcta ctgatatctt ggcagcattc 
             tgactatgaa accaaagata ctgatatctt ggcagcattc 
             tgattatgaa acccttgcta ctgatatctt ggcagcattc 
             tgagtaccaa gccaaggata ctgatatatt ggcagcattc 
             tgagtaccaa accaaggata ctgatatatt agcagcattc