Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:2/2
K:G
['cB)cA dbg(e de)dB', 'G2 (cB) AGA(B cB)ce dfg(e dc)dB cecA', 'G2 Bc dgBg dgBg (3(gfg) bg fdef', 'B(GGF) G(DB,D) (3(GFG)']  
X:1
L:1/8
M:2/2
K:G
 (dc) | BAG(B cB)cA | dbg(e de)dB | cecA (3(Bcd) (BG) | FGA(G FD)EG | BAB(G cB)cA | dbg(e de)dB | 
 cedc (3(BAG) (3(AGF) | G2 B2 G2 :: (cB) | AGA(B cB)ce | dfg(e dc)dB | cecA (3(Bcd) BG | 
 FGA(G FD)EF | (GF)(GA B)GFD | GABG ABcA | dgfe (3(ded) (3(cBA) | G2 B2 G2 :: Bc | dgBg dgBg | 
 (3(gfg) bg fdef | gage dedc | (3(BAG) (3(AGF) GDB,D | Gg(ge) dBGB | cBc(d ef)ge | 
 dgfe (3(ded) (3(cBA) | G2 B2 G2 :: (dc) | B(GGF) G(DB,D) | (3(GFG) (BG) ABcA | (dc)(de) f(dCA) | 
 (3(ded) (cA) d2 (cA) | B(GGF) G(DB,D) | (3(GFG) (3(BAG) ABcA | d(gfe) (3(ded) (3(cBA) | 
 G2 B2 G2 :|  