Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:2/2
K:G
['c2 (ec) B2 (dB)', 'z2 GABc d2 ef gage dBGB c2']  
X:1
L:1/8
M:2/2
K:G
 c2 (ec) B2 (dB) | AGAB AGEF | GAGE DEGB | AGAB AGEG | c2 (ec) B2 (dB) | AGBG AGEF | GAGEDEGA | 
 BGAF G2 z2 || GABc d2 ef | gage dBGB | c2 (ec) B2 (dB) | AGAB AG E2 | gfgd efge | dcBG AGEF | 
 GAGE DEGA | BGAF G2 z2 |]  