just add doubling

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XDIYTWKXHDIP OKCOGPANTMRK DTSIIHOTIYQH PMSDENTAOTIP LDRDQNESTHKF KYNGTEJHTQDU UIZPHINTGGXE CDHVYPSTVCSW MIZCPWDBDNBZ KYQMEUDKZJVV BDXUKHZRNIPJ ARVICAMSXJLP ENDHANDNMTAP SIPFONNZPZIR BXXNIWPATIQE
1.
end
2.
tip
3.
pat
4.
sip
5.
pant
6.
nest
7.
hint
8.
nip
9.
dent
10.
tap
11.
hand
12.
dip