判别一个单词，不论大小写都行

盐的英文是salt，现在极缺，请找出输入中所有包含salt的行，不管大小写，是salt就要。

 Input:

 若干行包含salt SALT sAlt等等的英文

 Output:

 所有包含salt这个部分的行

 Sample Input:

Salt is necessary
Water is not sAlt
as salT as you can make it
soy-bean sauce can be saLt
soy-bean sauce only
bean soy-bean sauce 

Sample Output:

Salt is necessary
Water is not sAlt
as salT as you can make it
soy-bean sauce can be saLt
代码：

#include <stdio.h>

void main()
{
	int i;
	char a[1000];
	while(gets(a))
	{
		for(i=0;i<strlen(a);i++)
		{
			if((a[i]=='S' || a[i]=='s') && 
			(a[i+1]=='A'||a[i+1]=='a') &&
			(a[i+2]=='L' || a[i+2]=='l') &&
			(a[i+3]=='T' || a[i+3]=='t'))
			   puts(a);
		}
	}
 }