http://utf-8.jp/public/aaencode.html

gistfile1.js

ﾟωﾟﾉ= /｀ｍ´）ﾉ ~┻━┻   //*´∇｀*/ ['_'];// ﾟωﾟﾉ = undefined
o=(ﾟｰﾟ)  =_=3;// o = 3  _ = 3  ﾟｰﾟ = 3
c=(ﾟΘﾟ) =(ﾟｰﾟ)-(ﾟｰﾟ);// c = 0
// o^_^o = 3
(ﾟДﾟ) =(ﾟΘﾟ)= (o^_^o)/ (o^_^o);// ﾟΘﾟ = 1
(ﾟДﾟ)={
	ﾟΘﾟ: '_' ,
	ﾟωﾟﾉ : ((ﾟωﾟﾉ==3) +'_') [ﾟΘﾟ] ,// 'a'
	ﾟｰﾟﾉ :(ﾟωﾟﾉ+ '_')[o^_^o -(ﾟΘﾟ)] ,// 'd'
	ﾟДﾟﾉ:((ﾟｰﾟ==3) +'_')[ﾟｰﾟ]// 'e'
};
// c^_^o = 0
(ﾟДﾟ) [ﾟΘﾟ] =((ﾟωﾟﾉ==3) +'_') [c^_^o];// ﾟДﾟ[1] = 'f'
(ﾟДﾟ) ['c'] = ((ﾟДﾟ)+'_') [ (ﾟｰﾟ)+(ﾟｰﾟ)-(ﾟΘﾟ) ];// ﾟДﾟ['c'] = 'c'
(ﾟДﾟ) ['o'] = ((ﾟДﾟ)+'_') [ﾟΘﾟ];// ﾟДﾟ['o'] = 'o'
// (ﾟДﾟ) + '_' = "[object Object]_"
(ﾟoﾟ)=(ﾟДﾟ) ['c']/* c */+(ﾟДﾟ) ['o']/* o */+(ﾟωﾟﾉ +'_')[ﾟΘﾟ]/* n */+ ((ﾟωﾟﾉ==3) +'_') [ﾟｰﾟ]/* s */ + ((ﾟДﾟ) +'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]/* t */+ ((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]/* r */+((ﾟｰﾟ==3) +'_') [(ﾟｰﾟ) - (ﾟΘﾟ)]/* u */+(ﾟДﾟ) ['c']/* c */+((ﾟДﾟ)+'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]/* t */+ (ﾟДﾟ) ['o']/* o */+((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]/* r */;// ﾟoﾟ = 'constructor'
(ﾟДﾟ) ['_'] =(o^_^o) [ﾟoﾟ]/* Number */ [ﾟoﾟ];// Function
(ﾟεﾟ)=((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]/* r */+ (ﾟДﾟ) .ﾟДﾟﾉ/* e */+((ﾟДﾟ)+'_') [(ﾟｰﾟ) + (ﾟｰﾟ)]/* t */+((ﾟｰﾟ==3) +'_') [o^_^o -ﾟΘﾟ]/* u */+((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]/* r */+ (ﾟωﾟﾉ +'_') [ﾟΘﾟ]/* n */;// ﾟεﾟ = 'return'
(ﾟｰﾟ)+=(ﾟΘﾟ);// ﾟｰﾟ = 3+1 = 4
(ﾟДﾟ)[ﾟεﾟ]='\\';// ﾟДﾟ["return"] = '\\'
(ﾟДﾟ).ﾟΘﾟﾉ=(ﾟДﾟ+ ﾟｰﾟ)[o^_^o -(ﾟΘﾟ)];// ﾟДﾟ["ﾟΘﾟﾉ"] = 'b'
(oﾟｰﾟo)=(ﾟωﾟﾉ +'_')[c^_^o];// oﾟｰﾟo = 'u'
(ﾟДﾟ) [ﾟoﾟ]='\"';// ﾟДﾟ["constructor"] = '\"'
(ﾟДﾟ) ['_'] ( (ﾟДﾟ) ['_'] (ﾟεﾟ+(ﾟДﾟ)[ﾟoﾟ]+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ (o^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ ((o^_^o) +(o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ (o^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ ((o^_^o) +(o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟｰﾟ)+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟΘﾟ)+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟｰﾟ)+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) - (ﾟΘﾟ))+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ ((o^_^o) - (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟｰﾟ)+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟoﾟ]) (ﾟΘﾟ)) ('_');