declare -A input_fields_list=( [one]=1 [two]=1 [three]=1 [four]=1 [five]=1 )
declare -A req_fields_list=( [one]=1 [six]=1 [seven]=1 [eight]=1 )
declare -A non_input_fields_list=( [two]=1 [three]=1 [seven]=1 [eight]=1 [nine]=1 )
 
for xfr in "${!input_fields_list[@]}"; do
  [[ ${req_fields_list[$xfr]} ]] && continue
  [[ ${non_input_fields_list[$xfr]} ]] && continue
  echo "$xfr not found" >&2
  exit 1
done
 
echo "All input fields are valid" >&2
exit 0
 

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