delta-1 = "\u03B4"
delta-2 = "\U000003B4"
a       = "\u0061"
b       = "\u0062"
c       = "\U00000063"
null-1  = "\u0000"
null-2  = "\U00000000"

ml-delta-1 = """\u03B4"""
ml-delta-2 = """\U000003B4"""
ml-a       = """\u0061"""
ml-b       = """\u0062"""
ml-c       = """\U00000063"""
ml-null-1  = """\u0000"""
ml-null-2  = """\U00000000"""