Two posts are needed because we're talking about two different songs.
1 Kermit's African Alphabet.
A tribe of African Anything Muppets start walking through the forest clearing singing the alphabet as follows.
A, B, C, D, E, F, Gee. H, I, J, K, L, M, N-O-P as one quick triple note (foorgot what they're called.) Q, R, S, T, U, V, W. (With breaths in between) X, Y, Zee.
Then Round 2 of the song begins with Kermit The Frog singing the same letters in the same tone as the African Anything Muppets. And one of the tribe lets out a high-pitched note.
Then comes Round 3 where Kermit sings a nice little song while the tribe sings out their alphabet out again.
Tribe: A
Kermit: Amazing (and this is how the rest of the song's dialogue proceeds)
B
Beautiful
C
Creatures
D
Dancing
E
Excitement
F
Forest
G
Glade.
Kermit: In my
Tribe: H
Kermit: How
Tribe: I
Kermit: I do
J
Jump like the
K
Kuduu as I
L
Listen to the
M
Music so
N-O-P
Nicely Organ Played.
Q
Quietly
R
Rest up
S
Sleepy
T
Tiger
U
Under
V
The Vinetree by the
W
Water's side.
X
And X marks the spot
Y
'Neath the Yellow moon
Z
Where the Zulu/Zumbu chief and I did hide/dine.
Tribe: Unandi, unandi hey kami kachey. Rrrrrrrr. Hey K'man.
Hope this helps.
PS: The song where Ladysmith Black Mumbasa sings out a nice little alphabet song is another song altogether different from this song/sketch.