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3 years, 5 months ago
3 years, 5 months ago
BOOK---- 2 15 15 11 11+2=13 and 11-2=9 so 139
PEN --- 16 5 14. 16+14=30. 16-14=2
So code 302
than
COPY---3 15 16 25. 25+3=28 25-3=22
And 2822
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