Ie or ei

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XJDNPLBZINBEOZUKFQNE KJZVJDINNCAFFEINENLQ MTPPGHDUJWGNVFYDWMTF WDMLWVCDJENPCFXCDDMC QAWYPQMKEIWUIIBOHEFC FLYELGQFSROUPCVTEAWE OOTJSLVQKDSIIIRARLUN RZUHJDUGDPCTQEPCMUJV EXNHVPVYFGIJJNKUOWLN ICXHNREJSPEEHTMXZWXC GQRKUOYWUENARAMZQCEH NJKWKFVNFICBJCBPAGTU EBVMHITCFTECBNSGBCNR RCIGLCSVIHFTXZSHEHTE MSSXLIWVCECGSPECIESK EANCIENTIRCSBNAKROSI WUBGVNADEFICIENTPGGD SEIZETUKNNPLEISUREPO HEIGHTSQTGPROTEINGHW JYLSFNEITHERGLACIERO
1.
Ancient
2.
Efficient
3.
Caffeine
4.
Sufficient
5.
Deficient
6.
Proficient
7.
Species
8.
Science
9.
Either
10.
Neither
11.
Leisure
12.
Glacier
13.
Seize
14.
Foreigner
15.
Weird
16.
Height
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Protein