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array1 = {this1 this2 this11 this21 this23};
array2 = {h2this1 h3this2 h5this21 h6this23 h8this13}

for $i(0.. $#array1){
 for $j(0.. $#array2){
...
    print"$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