#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;
}