text: #include <stdio.h>
  int main(void)
  {
  
  	char col;
  
  	printf("Enter colour: ");
  	scanf(" %c", &col);
  
  	if ((col == 'o') || (col == 'O'))
  	{
  		printf("The cylinder contains Ammonia\n");
  	}
  
  	else if ((col == 'b') || (col == 'B'))
  	{
  		printf("The cylinder contains Ammonia\n");
  	}
  
  	else if ((col == 'y') || (col == 'Y'))
  	{
  		printf("The cylinder contains Ammonia\n");
  	}
  
  	else if ((col == 'g') || (col == 'G'))
  	{
  		printf("The cylinder contains Ammonia\n");
  	}
  
  	else
  	{
  		printf("Invalid Colour\n");
  	}
  
  	printf("Glad to be of service\n");
  
  	return 0;
  }
  