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perl -i -pe 's/\.mbh_succ_roam_i_vlr_e_plmn/\.new_mbh_succ_roam_i_vlr_ +e_plmn/g' <input_file>
file content, __DATA__ .mbh_succ_roam_i_vlr_e_plmn next .mbh_succ_roam_i_vlr_e_plmn1 first .mbh_succ_roam_i_vlr_e_plmn2 verify