Flamingos build nests that look like mounds of mud along waterways. At the top of the mound, in a shallow hole, the female lays one egg. The parents take turns sitting on the egg to keep it warm. After about 30 days, the egg hatches. Flamingo young are born white, with soft, downy feathers and a straight bill.
The first digit of a UPC-A Barcode is number system character. The following table shows you what different number system characters mean. 0: Standard UPC number 1: Reserved 2: Random weight items (fruits, meat, vegetables, etc. 3: Pharmaceuticals
The last digit of the UPC code is called a check digit. This digit lets the scanner determine if it scanned the number correctly or not. Here is how the check digit is calculated for the other 11 digits, using the code 63938200039 from The Teenager's Guide to the Real World example shown above: