#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;i++)
        {
            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(1isValidInput(name)){
        printf("Invalid input\n");
        return 0;
    }
    printPyramid (name);
    return 0;
    
    
}
}