my %codon_table = (
    TTT => 'F', TCT => 'S', TAT => 'Y', TGT => 'C',
    TTC => 'F', TCC => 'S', TAC => 'Y', TGC => 'C',
    TTA => 'L', TCA => 'S', TAA => '-', TGA => '-',
    TTG => 'L', TCG => 'S', TAG => '-', TGG => 'W',
    CTT => 'L', CCT => 'P', CAT => 'H', CGT => 'R',
    CTC => 'L', CCC => 'P', CAC => 'H', CGC => 'R',
    CTA => 'L', CCA => 'P', CAA => 'Q', CGA => 'R',
    CTG => 'L', CCG => 'P', CAG => 'Q', CGG => 'R',
    ATT => 'I', ACT => 'T', AAT => 'N', AGT => 'S',
    ATC => 'I', ACC => 'T', AAC => 'N', AGC => 'S',
    ATA => 'I', ACA => 'T', AAA => 'K', AGA => 'R',
    ATG => 'M', ACG => 'T', AAG => 'K', AGG => 'R',
    GTT => 'V', GCT => 'A', GAT => 'D', GGT => 'G',
    GTC => 'V', GCC => 'A', GAC => 'D', GGC => 'G',
    GTA => 'V', GCA => 'A', GAA => 'E', GGA => 'G',
    GTG => 'V', GCG => 'A', GAG => 'E', GGG => 'G',
);