Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:1/8=160
M:6/8
K:Amin
['z a2 A AGE GAB A3 eag', 'A2 ^g a^ga ged ecg edc A3']  
X:1
L:1/8
Q:1/8=160
M:6/8
K:Amin
 z | a2 A AGE | GAB A3 | eag edc | eAB AGE | cde dcA | G3 GB/c/d | eAa ged | cA^G A2 :| ^g | 
 a^ga ged | ecg edc | A3 GAc | dec deg | aeg dec | A3 EGE | cde ged | cA^G A2 :|  