Rephrase this text: The capacity of ENIAC was too small for a complete simulation, so NAME_1 and NAME_2 greatly simplified the equation, ignoring many physical effects and attempting to calculate, at least approximately, only the first phase of a deuterium-tritium mixture explosion in one-dimensional space. The details and results of the calculations carried out in November-December 1945 are still classified. ENIAC was given the task of solving a very complex differential equation which required about one million punched cards to enter the input data. The input problem was divided into several parts so that the data could fit into the computer's memory. The intermediate results were printed on punched cards and, after recombination, fed back into the machine. In April 1946, NAME_3's group discussed the results of the calculations and concluded that they were reassuring enough (albeit very approximate) to prove that a hydrogen bomb could be made. Please reply with exactly 7 paragraphs and separate each paragraph with two new lines. The very last paragraph must start with the word "proactive".
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