Generate a piece of music. The title is Gretlein. It belongs to the genres of "Romanze"" Ballade"and " Lied". It is from Europa, Mitteleuropa, Deutschland. Its meter type is irregular.  
X:1
T:Gretlein
T:Gretlein
L:1/4
M:6/2
I:linebreak $
K:F
V:1 treble nm="Voice" snm="V"
V:1
 c2 | c4 c4 B2 A2 | F4 G2 F4 F2 | c4 c4 B2 A2 | G3 A B2 A4 G2 |[M:4/2] F2 F2 E2 C2 | %6
[M:6/2] D4 E2 F4 A2 |[M:4/2] G2 G2 F2 E2 |[M:6/2] D4 C4 z2 c2 |[M:4/2] c2 c2 B2 A2 | G4 F4- || F2 | %12  