暴力

#include <bits/stdc++.h>
using namespace std;
int main()
{
cout<<"lightshinechinashakehteuniversedonotfogetfistdreamyoucanyouuptopcarecdioisgood";
return 0;
}

正解：

#include <bits/stdc++.h>
using namespace std;
string s="Light shine china shake hte universE Do noT foget fist dream you can youUptopcare cdio is GOOd";
int main()
{
for(int i=0;i<s.size();i++)
{
if(s[i]>='A'&&s[i]<='Z') s[i]=s[i]-'A'+'a';
}
for(int i=0;i<s.size();i++)
{
if(s[i]>='a'&&s[i]<='z') cout<<s[i];
}
return 0;
}