Concatenate to Form Target List

Create a function that returns True if smaller lists can concatenate to form the target list and False otherwise.

Examples

canConcatenate([[1, 2, 3, 4], [5, 6], [7]], [1, 2, 3, 4, 5, 6, 7]) ➞ True

canConcatenate([[2, 1, 3], [5, 4, 7, 6]], [7, 6, 5, 4, 3, 2, 1]) ➞ True

canConcatenate([[2, 1, 3], [5, 4, 7, 6, 7]], [1, 2, 3, 4, 5, 6, 7]) ➞ False
# Duplicate 7s not found in target list.

canConcatenate([[2, 1, 3], [5, 4, 7]], [1, 2, 3, 4, 5, 6, 7]) ➞ False
# Missing 6 from target list.

Notes

• Lists do not have to be sorted (see example #2).
• Lists should concatenate to create the final list exactly (see examples #3 and #4).