Where $Y = 0.493

INPUT:

>NODE_3_length_6653_cov_3.3011
CCGCTGCGGTCGGTCCTGCCACTCGGTGTCCGACCGCTATGATGACCGCAGCGGCTG
>NODE_5_length_6344_cov_2.95448
CCGGTGCAAGCTGCGGCTGGCATCAGTTTAAGAGTTCGCCCCGGCGACCGCTTTGTC

DESIDERED OUTPUT:
>NODE_3_length_6653
Nucleotidic_cov: 6.69
CCGCTGCGGTCGGTCCTGCCACTCGGTGTCCGACCGCTATGATGACCGCAGCGGCTG
GC_CONT: # value provided by script works, so doesn't matter here
>NODE_5_length_6344
Nucleotidic_cov: 5.99
CCGGTGCAAGCTGCGGCTGGCATCAGTTTAAGAGTTCGCCCCGGCGACCGCTTTGTC
GC_CONT: # value provided by script works, so doesn't matter here