Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:4/4
K:Amix
['(3Bcd ec d2 cd', 'GE E2']  
X:1
L:1/8
M:4/4
K:Amix
 (3Bcd ec d2 cd | eA A2 GEEA | (3Bcd ec d2 cd | eAAG GA A2 | (3Bcd ec d2 cd | eA A2 GEEA | 
 (3Bcd ed (3Bcd ed | cABc dcBA || GE E2 GEDE | GEED B2 BA | GE E2 GEDB | BABG A2 BA | GE E2 GEDE | 
 GEED B2 BA | GE E2 GEDB | BABG A2 A2 ||  