Show the behavior of your parsers of Exercises 4.54 and 4.55 on the erroneous inputs

Exercises 4.54 Construct error-correcting operator-precedence and LR parsers for the following grammar:
The grammar in Exercise 4.54 can be made LL by replacing the productions for list by Construct an error-correcting predictive parser for the revised grammar.
Exercise 4.54 Construct error-correcting operator-precedence and LR parsers for the following grammar:
