<?php
$input = array('INPUT_1'=>array(74,69),'INPUT_2'=>array(45,1));
print_r($input);

$a = array();
$b = array();
foreach($input as $key => $in){
	$a[$key] = $in[0];
	$b[$key] = $in[1];
}
print_r($a);
print_r($b);