A Study to Test How Either a Capsule or a Tablet With NDec (Decitabine and Tetrahydrouridine) Works in the Body of Healthy People

Inclusion Criteria: * Informed consent obtained before any study-related activities. Study-related activities are any procedures that are carried out as part of the study, including activities to determine suitability for the study. * Male or female. * Age 18 64 years (both inclusive) at the time of signing the informed consent. * Body weight between 60.0 and 100.0 kilogram (kg) (both inclusive) at screening. * Body mass index between 18.5-29.9 kilograms per square meter (kg/m\^2) (both inclusive). * Considered to be generally healthy based on the medical history, physical examination, and the results of vital signs, electrocardiogram and clinical laboratory tests performed during the screening visit, as judged by the investigator. Exclusion Criteria: * Platelet count greater than (\>) 400\*10\^9/ Liter (L) at visit 1 * Absolute neutrophil count less than or equal to (≤) 1.5\*10\^9/L at visit 1 * Female who is: 1. pregnant, breast-feeding or intends to become pregnant during the trial or within 6 months after the last dose of trial product or 2. of childbearing potential and not using highly effective contraceptive method and whose male partner is not using effective contraception, from screening until 6 months after the last dose of trial product * Male of reproductive age with female partner of childbearing potential who does not agree to use condoms and whose female partner of childbearing potential is not using a highly effective contraceptive measure (or adequate contraceptive measure as required by local regulation or practice) from signing the informed consent form (ICF) until 6 months after the last dose.