The term 'String Puller' is a job description for two separate roles. The first role is a 'USER', which is a four letter word, and the second role is an 'UNDOER', which is a six letter word. A String Puller is someone who is responsible for managing the strings of a puppet or marionette. The USER is responsible for manipulating the strings to make the puppet move in a certain way, while the UNDOER is responsible for untangling any knots that may form in the strings.