王丞杰 • 4个月前
#include<bits/stdc++.h>
#define ll long long
using namespace std;
string s1,s2,s3;
int main(){
getline(cin,s1);
int len=s1.size();
s2=s1;
s3=s1;
cout<<s1<<endl;
for(int i=0;i<len;i++){
if(s2[i]>='A'&&s2[i]<='Z'){
s2[i]=' '; }
} cout<<s2<<endl;
for(int i=0;i<len;i++){
if(s3[i]>='a'&&s3[i]<='z')
s3[i]=' '; }
} cout<<s3<<endl; return 0;
}
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