Decode Caesar ciphers by inaniwa(rand)

main(c,r){for(;read(0,&c,1);)putchar(c/65*c%95?(c%32-"\xf9\xf3\xed"[-r%3])%26+1|c&96:c);}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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