I think I finally got it thanks to sCrypt BSV library testing!
The numbers have to be expressed in hex form, for example, 15 (0F):
0F OP_DUP OP_3 OP_MOD OP_1 OP_LESSTHAN OP_IF 666f6f OP_SWAP OP_1 OP_TOALTSTACK OP_ENDIF OP_5 OP_MOD OP_1 OP_LESSTHAN OP_IF 6261720a OP_FROMALTSTACK OP_1 OP_ADD OP_TOALTSTACK OP_ENDIF OP_FROMALTSTACK OP_1 OP_GREATERTHAN OP_IF OP_CAT OP_ENDIF
I think I finally got it thanks to sCrypt BSV library testing!
The numbers have to be expressed in hex form, for example, 15 (0F):
0F OP_DUP OP_3 OP_MOD OP_1 OP_LESSTHAN OP_IF 666f6f OP_SWAP OP_1 OP_TOALTSTACK OP_ENDIF OP_5 OP_MOD OP_1 OP_LESSTHAN OP_IF 6261720a OP_FROMALTSTACK OP_1 OP_ADD OP_TOALTSTACK OP_ENDIF OP_FROMALTSTACK OP_1 OP_GREATERTHAN OP_IF OP_CAT OP_ENDIF