Need some hint to solve question recursively

#1

please give me some hint .so that i can solve this question recursively

#2

Use a recursive function like this to print:

void print(char* word,int i,int length)
{
if(i==length)
return;
if(word[i]!=word[i+1])
cout<<word[i];
print(word,i+1,length);
}

Check/ Dry run with an example.