helper functions concat number into byte array.
concat functions: - c14 - c41 - c44 - c144 - c414 - c441 - c444 - c4414 - c4441 - c4444 - c44144 - c44414 - c444144
from functions: - f14 - f41 - f44 - f144 - f414 - f441 - f444 - f4441 - f4414 - f4444 - f44144 - f444144