Username must contain only letters and numbers and must start with a letter. It has to be at least 4 letters long. It isn't case sensitive.

Password must contain only letters and numbers and must start with a letter. It has to be at least 8 letters long

Birthday should be input YY/MM/DDDD

Favor digitar as letras como são mostradas na imagem.
As letras não diferenciam maiúsculas de minúsculas.