Recursion-Smart Keypad - Advanced

#1

In this case should i assume 0 and 1 phone keypad as null?

#2

In this code table.size() is giving error and please point out the mistakes which i have made

#3

Please resolve my doubt

#4

make it nothing or empty like a space

#5

size() is method for a string to calculate its length u r using it for
array of string

#6

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