You are given four digits N_1, N_2, N_3 and N_4. Determine if these can be arranged into the sequence of digits "1974".

Constraints

• $0 \leq N_1, N_2, N_3, N_4 \leq 9$
• N_1, N_2, N_3 and N_4 are integers.

Input

Input is given from Standard Input in the following format:

N_1 N_2 N_3 N_4

Output

If N_1, N_2, N_3 and N_4 can be arranged into the sequence of digits "1974", print YES; if they cannot, print NO.

Examples

Input

1 7 9 4

Output

YES

Input

1 9 7 4

Output

YES

Input

1 2 9 1

Output

NO

Input

4 9 0 8

Output

NO

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