Develop melodies utilizing the stated letter notation and the provided theme.
X:1
L:1/8
Q:1/4=120
M:2/2
K:G
['gfga gedg', 'c2 c2 BAGB AGBG AGEF GFGE DEGA', 'gedg edBG A2 [GB]2 c2', 'Bcdc BAGB']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:G
"^Quick" ef |"^*$" g2 ef e2 d2 | BAGB AG [GB]2 | gfga gedg | e a2 ^g a2 f2 | gfga gedg | 
 dBAG BGEF | GFGE DEGA | BGAF G2 :: AB | c2 c2 BAGB | AGBG AGEF | GFGE DEGA | BGBG A2 G2 | 
"^**" c2 c2 BAGB | AGBG AGEF | GFGE DEGA | BGAF G2 :|"^Substitutions""^*" g2 (f/g/f) e2 d2 || 
"^or $" gfga gedg | edBG A2 [GB]2 |]"^**" c2 ec Bcdc | BAGB AGEF |]  