S -> AdbA | b | Sf
A -> Bb | cS | e
B -> SS | aa | a

FIRST
-----
S   b   FIRST(A)    |   bce     |   abce    |
A   ce  B   |   cea     |   abce    |
B   a   S   |   abce    |   abce    |

FOLLOW
------
S   #, f, FO(A), FI(S), FO(B)   |   #abcef  AB  | #abcdef
A   d, FO(S)                    |   d       S   | #abcdef
B   b                           |   b           | b


FIRST(S) = {a, b, c, e} = FIRST(A) = FIRST(B)


S -> abC | Ab | B
B -> f | B+B | Ab
A -> aa | eA | d | E
E -> f
C -> E | A


S -> dSdS | A | eB
A -> a | BA
B -> b | c

FIRST
-----

S   de  A   | ade   | abcde | abcde
A   a   B   | abc   | abc   | abc
B   bc      | bc    | bc    | bc

    a       b       c       d       e       #
S   (A,2)   (A,2)   (A,2)   (dSdS,1)(eB,3)
A   (a,4)   (BA,5)  (BA,5)
B           (b,6)   (c,7)





S -> ABCBA
A -> aB | a
B -> bA | b
C -> cAcB

FIRST
--------
S       A   | a
A a         | a
B b         | b
C c         | c

FOLLOW
---------
S   #
A   FIRST(B),FOLLOW(S),FOLLOW(B),c
B   FIRST(C),FIRST(A),FOLLOW(A),FOLLOW(C)
C   FIRST(B)


S   #
A   bc      SB
B   ca      AC
C   b