So you aked me to to help explain a procedure to identify and eliminate letters that is duplicated in any string posed...
1. Create string Array with name S.
2. Create ywo counters i and j both initially set to 0.
3. Compare sequentally array elements S to each other by using 2 nested loops utilising both counters.
a. Create outer loop with counter j WHILE there are elements in the Array
b. Create inner loop IF S[j] == S[i] THEN POP S[i] from Array AND i=i+1, ELSE i=i+1.
c. Increment counter j=j+1
4. Print Array after all the popping...