{
  earth => {
             proline => ["CCA", "CCC", "CCG", "CCT"],
             serine  => ["TCA", "TCC", "TCG", "TCT"],
           },
  mars  => {
             proline => ["ZXZ", "ZXX", "ZXQ", "ZXW"],
             serine  => ["QWZ", "QWX", "QWW"],
           },
}
TCA
TCC
TCG
TCT
CCA
CCC
CCG
CCT
QWZ
QWX
QWW
ZXZ
ZXX
ZXQ
ZXW