This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<cstdio>
#include<cstring>
char str[11111];
int main()
{
	int n;
	scanf("%d", &n);
	getchar();
	gets(str);
	char *pch;
	pch = strtok(str, " ");
	while(pch!=NULL){
		char tmp[111];
		int len;
		sprintf(tmp,"%s", pch);
		len = strlen(tmp);
		for(int i=0;i<len;i+=2){
			if(tmp[i+1] !='\0'){
				int ans = (tmp[i]-'a'+tmp[i+1]-'a' - 2);
				if(ans < 0){
					ans+=26;
				}
				printf("%c", ans%26 + 'a');
			}
		}
		printf(" ");
		pch = strtok(NULL, " ");
	}
	return 0;
}
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