It is up to the individuals to keep up with their changing numbers and therefore fast-paced play is encouraged.
ɪɾ ɪz ˌʌp tə ðɪ ˌɪndᵻvˈɪdʒuːəlz tə kˈiːp ˌʌp wɪð ðɛɹ tʃˈeɪndʒɪŋ nˈʌmbɚz ænd ðˈɛɹfoːɹ fˈæstpˈeɪst plˈeɪ ɪz ɛŋkˈɜːɹɪdʒd.