public static void main(String []args)
 {
    Scanner sc=new Scanner(System.in);
    String st;
    int result=0,length=0,i;
    char ch;
    st=sc.nextLine();
    for(i=0;i<st.length();i++)
    {
        ch=st.charAt(i);
        if(ch!=' ')
        {
            length=length+1;
        }
        else
        {
            result=Math.max(result,length);
            length=0;
        }
    }
    result=Math.max(result,length);
    System.out.print(result);
 }