array1                            array2
abc_RCF_BM_allocation_0_kl        RCF_BM_allocation_0_in
aplc_RCF_BM_allocation_0_in_nml   BM_allocation_0
fbe_RCF_BM_allocation_0_in_tvg    RCF_BM_allocation_0
ap_hu_BM_allocation_0_in_nml

##</code><code>##

abc_RCF_BM_allocation_0_kl contains RCF_BM_allocation_0
aplc_RCF_BM_allocation_0_in_nml contains RCF_BM_allocation_0_in
fbe_RCF_BM_allocation_0_in_tvg contains RCF_BM_allocation_0_in
ap_hu_BM_allocation_0_in_nml contains BM_allocation_0

##</code><code>##

for($i=0;$i<$array1length;$i++){ 
for($j=0;$j<$array2length;$j++){ 
if($array1[$i] =~ /\b$array2[$j]\b/)

{print "$array1[$i] contains $array2[$j]";
}}}