Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
Q:3/8=90
M:6/8
K:F
['z F2 F G2 E F3 A2', 'c2 c d2 B B2 d c3']  
X:1
L:1/8
Q:3/8=90
M:6/8
K:F
 z | F2 F G2 E | F3 A2 B | c3 B2 G | (F2 E) C2 z | F2 F G2 E | F3 A2 B | c2 c d2 B | c3- c2 || c | 
 d2 B B2 d | c3 G2 A | B2 A c2 A | (F2 E) C2 C | F2 F G2 E | F3 A2 B | c3 B2 G | F3- F2 |]  