Read .txt(position based file) to CSV file In OIC.

Summary

Receiving Positioned based file from SFTP and need to create CSV file.

Content

Need suggestions on how to read .txt(position based file) file to csv. As of now am taking variables to read each field with substring. but some fields are not getting  correct values.

Ex: txt file line:  30000000000142550028400001000102001393         0000000004120005212020CHKUSDG-4974011

if i use substring (c1, 62,69). i should be getting 5212020' but am getting '05212020CHKUSD'. 

And Spaces also causing issue in reading.

Is there any other method to read?