#include <stdio.h>
#include <ctype.h>
#include <string.h>
int isValidinput(char name[]) 
{
   if (strlen(name)==0)
   {
       return 0;
   }
   for (int i = 0; i<strlen(name);i++)
   {
       if(!(isalpha(name[i]) || name[i]==''))
       {
           return 0;
       }
   }
   return 1;
}
void printPyramid(char name[])
{
    int len=strlen(name);
    for(int i=1;i<=len;i++)
    {
        for(int j=0;j<len-i;j++)
        {
            printf(" ");
        }
        for(int j=0;j<i;j++)
        {
            printf("%c",name[j]);
            if(j<i-1){
                printf(" ");
            }
        }
        printf("\n");
    }
}
int main()
{
    char name[100];
    fgets(name,sizeof(name),stdin);
    name[strcspn(name,"\n")]="\0";
    if(!isValidinput(name)){
        printf("Invalid input\n");
        return 0;
    }
    printPyramid(name);
    return 0;
}