#include <stdio.h>
#include <string.h>
int main(void)
{
char str[50] = "sufeiuA215.10.30.40";
char ip[50], *s;
unsigned q, i;
if(!(s=strchr(str,'A')))
*ip=0;
else
for(++s,q=0,i=0; s[q]; ++q)
if(s[q]=='.' && ++i==3)
{
while(s[++q]>='0' && s[q]<='9');
strncpy(ip, s, q), ip[q]=0;
break;
}
puts(ip);
return 0;
}