Which planet is missing?

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EARTHHIRIJ PETRQMPDBJ ABESQMARSA SATURNEBIG ZJUXTQUWEF URANUSRCLP NEPTUNEQNT UNVQUBKVEZ MERCURYVEV DVENUSCDJF
1.
Mercury
2.
Venus
3.
Earth
4.
Mars
5.
Saturn
6.
Uranus
7.
Neptune