> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> #define MAX_N 100
> int compare (const void *a ,const void *b){
> 	return (strcmp((char *)a,(char *)b));
> }
> int cmp_char(const void *a,const void *b){
> 	return ((char*)a)[0]-((char*)b)[0];
> }
> int main() {
> 	char dict[MAX_N][7],s[7],t[7];
> 	int n=0,i,len,size,flag;
> 	while(1){
> 		scanf("%s",dict[n]);
> 		if(strcmp(dict[n++],"XXXXXX")==0)
> 			break;
> 	}
> 	qsort(dict[0],n-1,sizeof(dict[0]),compare);
> 	while(1){
> 		scanf("%s",s);
> 		if(strcmp(s,"XXXXXX")==0)
> 			break;
> 		len=strlen(s);
> 		qsort(s,len,sizeof(char),cmp_char);
> 		flag=0;
> 		for(i=0;i<n-1;i++){
> 			size=strlen(dict[i]);
> 			if(size==len){ //长度相等
> 				strcpy(t,dict[i]);
> 				qsort(t,size,sizeof(char),cmp_char);
> 				if(strcmp(s,t)==0){//equals
> 					flag=1;
> 					printf("%s\n",dict[i]);
> 				}
> 			}
> 		}
> 		if(!flag)
> 			printf("NOT A VALID WORD\n");
> 		printf("******\n");
> 	}
> 	return 0;
> }