#include <cstdio>
#include<iostream>
using namespace std;
string ip()
{
string i="";
int temp=getchar_unlocked();
while(temp<'a'||temp>'z')
temp=getchar_unlocked();
while(temp>='a'&&temp<='z')
{
i+=(char)temp;
temp=getchar_unlocked();
}
return i;
}
int main()
{
std::cout<<ip();
return 0;
}
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