How to forget

gistfile1.txt

.ylevitcepser ,yerg dna ,yerg krad ,kcalb era 2-0 *     
dna ,'w' s'ti ,etihw roF .sedahs rethgil eht era snoisrev esacrewol *     
eht elihw ,sedahs rekrad eht era esoht fo snoisrev esacreppu ehT *     
.elprup rof si P dna ,eulb rof si B ,nayc rof si C ,neerg rof si G *     
,wolley rof si Y ,der rof si R .roloc eht stneserper rahc erehw *     
]rahc[` fo mrof eht ni era sorcam ehT .gnirts a ni sorcam roloc ecalpeR

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