040000 tree ed6e130c386856c448a853a4dc808ba42bc95838	arithmetic
040000 tree e0a55ed3b3a993b0a64115146bce0e3217499982	comparison_operators
040000 tree 78ace404481041f15891c4129f70249ec2a0b65f	cons
040000 tree ab4c36321d7d6230581e560dbb1a7725dd0c334e	literals
040000 tree 2d6529df40b97490748143098322f98bf7e2c678	requirements