#%main_hash -> $keyA -> index[0] -> {$keya => $vala}
#                    -> index[1] -> {$keyb => $valb}
#                    -> index[2] -> {$keyc => $valc}
#
#           -> $keyB -> index[0] -> {$keyd => $vald}
#                    -> index[1] -> {$keye => $vale}
#                    -> index[2] -> {$keyf => $valf}