#include<string.h>
#include<stdio.h>
#include<math.h>

//calculating resistance based on first three bands
int resistance_calc(char a[], char b[], char c[], char d[]){

int first, second, third, fourth;


if((strcmp(a, "Brown") || strcmp(a, "BROWN") || strcmp(a, "brown"))==1)
first = 1;
if((strcmp(a, "Red") || strcmp(a, "RED") || strcmp(a, "red"))==1)
first = 2;
if((strcmp(a, "Orange") || strcmp(a, "ORANGE") || strcmp(a, "orange"))==1)
first = 3;
if((strcmp(a, "Yellow") || strcmp(a, "YELLOW") || strcmp(a, "yellow"))==1)
first = 4;
if((strcmp(a, "Green") || strcmp(a, "GREEN") || strcmp(a, "green"))==1)
first = 5;
if((strcmp(a, "Blue") || strcmp(a, "BLUE") || strcmp(a, "blue"))==1)
first = 6;
if((strcmp(a, "Violet") || strcmp(a, "VIOLET") || strcmp(a, "violet"))==1)
first = 7;
if((strcmp(a, "Gray") || strcmp(a, "GRAY") || strcmp(a, "gray"))==1)
first = 8;

if((strcmp(a, "White") || strcmp(a, "WHITE") || strcmp(a, "white"))==1)
first = 9;
else
	printf("Please input a valid first band color (red, orange, yellow, green, violet,  gray or white)");
scanf("%s", a);


if((strcmp(b, "Black") || strcmp(b, "BLACK") || strcmp(b, "black"))==1)
second = 0;
if((strcmp(b, "Brown") || strcmp(b, "BROWN") || strcmp(b, "brown"))==1)
second = 1;
if((strcmp(b, "Red") || strcmp(b, "RED") || strcmp(b, "red"))==1)
second = 2;
if((strcmp(b, "Orange") || strcmp(b, "ORANGE") || strcmp(b, "orange"))==1)
second = 3;
if((strcmp(b, "Yellow") || strcmp(b, "YELLOW") || strcmp(b, "yellow"))==1)
second = 4;
if((strcmp(b, "Green") || strcmp(b, "GREEN") || strcmp(b, "green"))==1)
second = 5;
if((strcmp(b, "Blue") || strcmp(b, "BLUE") || strcmp(b, "blue"))==1)
second = 6;
if((strcmp(b, "Violet") || strcmp(b, "VIOLET") || strcmp(b,  "violet"))==1)
second = 7;
if((strcmp(b, "Gray") || strcmp(b, "GRAY") || strcmp(b, "gray"))==1)
second = 8;
if((strcmp(b, "White") || strcmp(b, "WHITE") || strcmp(b, "white"))==1)
second = 9;
else
	printf("Please input a valid second band color (black, red, orange, yellow, green, violet, gray or white)");
scanf("%s", b);


if((strcmp(c, "Black") || strcmp(c, "BLACK") || strcmp(c, "black"))==1)
third = 0;
if((strcmp(c, "Brown") || strcmp(c, "BROWN") || strcmp(c, "brown"))==1)
third = 1;
if((strcmp(c, "Red") || strcmp(c, "RED") || strcmp(c, "red"))==1)
third = 2;
if((strcmp(c, "Orange") || strcmp(c, "ORANGE") || strcmp(c, "orange"))==1)
third = 3;
if((strcmp(c, "Yellow") || strcmp(c, "YELLOW") || strcmp(c, "yellow"))==1)
third = 4;
if((strcmp(c, "Green") || strcmp(c, "GREEN") || strcmp(c, "green"))==1)
third = 5;
if((strcmp(c, "Blue") || strcmp(c, "BLUE") || strcmp(c, "blue"))==1)
third = 6;
if((strcmp(c, "Violet") || strcmp(c, "VIOLET") || strcmp(c, "violet"))==1)
third = 7;
if((strcmp(c, "Gray") || strcmp(c, "GRAY") || strcmp(c, "gray"))==1)
third = 8;
if((strcmp(c, "White") || strcmp(c, "WHITE") || strcmp(c, "white"))==1)
third = 9;
else
	printf("Please input a valid third band color (black, red, orange, yellow, green, violet, gray or white)");
scanf("%s", c);


if((strcmp(d, "Silver") || strcmp(d, "SILVER") || strcmp(d, "silver"))==1)
fourth = pow(10,-2);
if((strcmp(d, "Gold") || strcmp(d, "GOLD") || strcmp(d, "gold"))==1)
fourth = pow(10, -1);
if((strcmp(d, "Black") || strcmp(d, "BLACK") || strcmp(d, "black"))==1)
fourth = pow(10, 0);
if((strcmp(d, "Brown") || strcmp(d, "BROWN") || strcmp(d, "brown"))==1)
fourth = pow(10, 1);
if((strcmp(d, "Red") || strcmp(d, "RED") || strcmp(d, "red"))==1)
fourth = pow(10, 2);
if((strcmp(d, "Orange") || strcmp(d, "ORANGE") || strcmp(d, "orange"))==1)
fourth = pow(10, 3);
if((strcmp(d, "Yellow") || strcmp(d, "YELLOW") || strcmp(d, "yellow"))==1)
fourth = pow(10, 4);
if((strcmp(d, "Green") || strcmp(d, "GREEN") || strcmp(d, "green"))==1)
fourth = pow(10, 5);
if((strcmp(d, "Blue") || strcmp(d, "BLUE") || strcmp(d, "blue"))==1)
fourth = pow(10, 6);
if((strcmp(d, "Violet") || strcmp(d, "VIOLET") || strcmp(d, "violet"))==1)
fourth = pow(10, 7);
if((strcmp(d, "Gray") || strcmp(d, "GRAY") || strcmp(d, "gray"))==1)
fourth = pow(10, 8);
if((strcmp(d, "White") || strcmp(d, "WHITE") || strcmp(d, "white"))==1)
fourth = pow(10, 9);
else
	printf("Please input a valid fourth band color (silver, gold, black, red, orange, yellow, green, violet, gray or white)");
scanf("%s", d);

return (((first*100)+(second*10)+(third))*fourth);
}

int main(void)
{
  char str[100]="";
  char *bands[6];
  int i;
  float resistance;
//Reads in a string
  fgets(str, 100, stdin);

//Seperates the string, by space character, into an array
  bands[0]=strtok(str," ");
  if(bands[0]==NULL)
   {
    printf("Please input the six color bands from you resistor.\n");
    return (0);
   }

  for(i=1;i<6;i++)
   {
    bands[i]=strtok(NULL," ");
    if(bands[i]==NULL)
      break;
   }

resistance = resistance_calc(bands[0], bands[1], bands[2], bands[3]);

printf("%10.4f Ohms\n", resistance);

  return 0;
}