Python - Cut all words between two Strings -

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could me cut strings between join , on keyword in addition first line using python 3?

input data assigned variable 

input_txt= date_dim date_dim_all inner join main_fact_response   on (date_dim_all.response_date = main_fact_response.response_date) left join dim_fore_main   on (dim_fore_main.id = fact_fore_respond.id) left join fact_fore_resi   on (fact_fore_resi.fore_re = fact_fore_respond.fore_re inner join fact_fore_respond fact_fore_respond_merit   on (       fact_fore_respond_merit.fore_respond = fact_fore_r espond.fore_respond

output data

date_dim date_dim_all, main_fact_response, dim_fore_main, fact_fore_resi, fact_fore_respond fact_fore_respond_merit 

 input_data = '''date_dim date_dim_all     inner join main_fact_response       on (date_dim_all.response_date = main_fact_response.response_date)     left join dim_fore_main       on (dim_fore_main.id = fact_fore_respond.id)     left join fact_fore_resi       on (fact_fore_resi.fore_re = fact_fore_respond.fore_re     inner join fact_fore_respond fact_fore_respond_merit       on (           fact_fore_respond_merit.fore_respond = fact_fore_r     espond.fore_respond'''     input_data = input_data.replace("join","cuthere") input_data = input_data.replace("on","cuthere") data_list = input_data.split('cuthere') data_list = data_list[1::2] #the next part of code needed because string multiline . = 0 < len(data_list):       data_list[i] = data_list[i].strip()

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