array (0,10) [(0,'a'),(1,'b'),(2,'c'),(3,'d'),(4,'e'),(5,'f'),(6,'g'),(7,'h'),(8,'i'),(9,'j'),(10,'k')]
array (0,10) [(0,'A'),(1,'B'),(2,'C'),(3,'D'),(4,'E'),(5,'F'),(6,'G'),(7,'H'),(8,'I'),(9,'J'),(10,'K')]
array (3,8) [(3,'e'),(4,'f'),(5,'g'),(6,'h'),(7,'i'),(8,'j')]