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int alphabetic(c)
char c;
{
if((c>='a'&&c <='z')||(c>='A'||c <='Z'))
return(1);
else
return(0);
}
int longest(string)
char string[];
{
int len=0,i,length=0,flag=1,place,point;
for(i=0;i <=strlen(string);i++)
if(alphabctic(string[i]))
if(flag)
{
point=i;
flag=0;
}
else
len++;
else{
flag=1;
if(len>length)
{
length=len;
place=point;
len=0;

}
}
return(place);
}
main()
{
int i;
char line[100];
printf("input\n");
gets(line);
printf("output\n");
for (i=longest(line);alphabctic(line[i]);i++)
printf("%c",line[i]);
printf("\n");
}

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