char*p,*q;main(a,b){for(;p&&*q||(q=b,p&&*++p)||~scanf("%s%s",p=&a,b);)printf(p[1]+*q?"%c%c ":"%c%c\n",*p,*q++);}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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