#include<iostream>
#include<string>
using namespace std;
int main()
{
    int i;
    string a;
    cout<<"\nEnter the Sentence:";
    getline(cin,a);
    cout<<"\nSentenced case:";
    if(a[0]>=97&&a[0]<=122)
    {
        a[0]-=32;
    }
    for(i=1;a[i]!='\0';i++)
    {
        if(a[i]>=65 &&a[i]<=90)
        {
            a[i]+=32;
        }
    }
    for(i=1;a[i]!='\0';i++)
    {
        if(a[i]==46 && a[i+1]==32)
        {
            if(a[i+2]>=97&&a[i+2]<=122)
            {
                a[i+2]-=32;
            }
        }
    }
    cout<<a;
    return 0;
}