Worksheet A

   Exercise 1              Exercise 2              Exercise 3

   a        c              d        e              g        i
   b        x              e        v              h        h
   c        a              f        w              i        g
   x        z              v        d              s        t
   y        b              u        f              r        s
   z        y              w        u              t        r


   Exercise 4              Exercise 5              Exercise 6

   j        p              o        b              a        c
   k        l              q        c              o        o
   l        m              b        q              c        e
   m        n              c        x              e        a
   n        k              x        z              i        u
   p        j              z        o              u        i


   Exercise 7              Exercise 8              Exercise 9

   b        p              p        b              f        d
   d        t              d        m              t        t
   s        s              g        d              q        f
   t        d              b        p              b        b
   p        b              m        g              d        q


   Exercise 10             Exercise 11             Exercise 12

   j         o             s         i             e         d
   d         f             i         s             o         j
   f         e             a         n             k         e
   o         d             n         a             d         k
   e         j             r         r             j         o