>seq1 single line sequence
ATCGATCGATCGATCGATCGATCGATCGATCG
>seq2 multiline sequence with 50bp per line
ATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCG
ATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCG
ATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCG
>seq3 multiline sequence with varying line lengths
ATCGATCGATCGATCGATCGATCG
ATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATC
ATCGATCGATCGATCGATCGATCGATCGATCG
ATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCGATCG
>seq4 another single line
GGCCGGCCGGCCGGCCGGCCGGCCGGCCGGCC
>seq5 multiline with short lines
ATG
CGT
AAA
TTT
GGG
CCC
>seq6 empty sequence
>seq7 sequence with mixed case
ATCGatcgATCGatcgATCGatcgATCGatcg
ATCGatcgATCGatcgATCGatcgATCGatcg