A processor has 16 integer registers (R0, R1, …, R15) and 64 floating point registers (F0, F1, …, F63). It uses a 2-byte instruction format. There are four categories of instructions: Type-1, Type-2, Type-3, and Type-4. Type-1 category consists of four instructions, each with 3 integer register operands (3Rs). Type-2 category consists of eight instructions, each with 2 floating-point register operands (2Fs). Type-3 category consists of fourteen instructions, each with one integer register operand and one floating-point register operand (1R + 1F). Type-4 category consists of N instructions, each with a floating-point register operand (1F). The maximum value of N is ________.

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