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strict is better!
Closes #12

blonkm/rubiks-cube,minakhan01/RubiksHarmony,blonkm/rubiks-cube,minakhan01/RubiksHarmony,blonkm/rubiks-cube,blonkm/rubiks-cube,minakhan01/RubiksHarmony,minakhan01/RubiksHarmony