array1 = {this1 this2 this11 this21 this23};
array2 = {h2this1 h3this2 h5this21 h6this23 h8this13}
####
for $i(0.. $#array1){
for $j(0.. $#array2){
if($array2[$j]=~ /$array1[$i]/){
print"$array1[$j] belongs to $array2[$i]";
last;
}}}
##
##
this1 belongs to h2this1
this2 belongs to h3this2
this2 belongs to h5this21
this2 belongs to h6this23
this1 belongs to h8this13
##
##
this1 belongs to h2this1
this2 belongs to h3this2
this21 belongs to h5this21
this23 belongs to h6this23
this1 belongs to h8this13