Answer: ABCD

AnswerCrossword Clue
ABCDQuartet for first graders
ABCDStart of a series
ABCDAlphabet vanguard
ABCDInitial quartet
ABCDOpening quartet
ABCDFour of a series
ABCDFirst four rows
ABCDFirst four rows at the Met
ABCD"... goldfish"
ABCDE antecedents
ABCDStart of a well-known series
ABCDAlphabet quartet
ABCDBasic quartet
ABCDReport-card foursome
ABCDAlphabetic sequence
ABCDStart of 26
ABCDStart of a kindergarten chorus
ABCDStart of a tot's chant
ABCDInitial alphabetic sequence
ABCDStart of a kindergarten chant
ABCDAlphabetic quartet
ABCDInitial letters
ABCDAlphabet starters
ABCDAlphabetic starters
ABCDStart of a children's rhyme
ABCDBlack verse rhyme scheme
ABCDStarting four
ABCDKindergarten song opening
ABCDFour to start with
ABCDLeading four
ABCDKindergarten quartet
ABCDPassing grades
ABCDStart of a kindergarten song
ABCDAlphabetical run
ABCDStarting lineup?
ABCDFirst string?
ABCDPassing options
ABCDStart of a classroom chant
ABCDInitial foursome
ABCDOpening four