is example we get the first 7 characters
    DISPLAY "Task2 = " xStr(1:7)

*   Task3 suffix(xStr,Length)
*   Extract the last Length number of chars from a string
*   Solution - use reference modification with start of substring
*   defined as the FullStringLength - SubStringLength + 1
*   In this example we get the last 13 characters.
    MOVE 13 TO StrLength
    DISPLAY "Task3 = " xStr2((StrSize - StrLength) + 1:StrLength)

*   Task4: trimblank(xStr)
*   Remove trailing blanks from a string
*