s[];f(c,d){char*p=s;for(c=d=!printf("(");*p;c&=1)d|=*p++=c*5+(c=*p)/2+24;d&15&&f();printf("())"+2*!c);}main(){for(;gets(s);puts(""))f();}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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