#include<stdio.h>
#include<string.h>
void longword(char s[],char t[]);
int main()
{
    char s[100],t[100],x;
    gets(s);
    x=strlen(longword(s,t));
    printf("%d",x);
    return 0;
}
void longword(char s[],char t[])
{
    int i=0,j,max=0,start;
    while(s[i]!='\0')
    {
        while(s[i]==' '&&s[i]=='\0')
        i++;
        if(s[i]!='\0')
            start=i;
        else
            break;
        while(s[i]!=' '&&s[i]=='\0')
        i++;
        if(i-start>max)
        {
            max=i-start;
            for(j=0;j<max;j++)
            {
                t[j]=s[start+j];
            }
            t[j]='\0';
        }
    }
}