Reference for Rosh Hashanah 12:14

והאי מעמך מיבעי ליה זה לקט שכחה ופאה קרי ביה עמך וקרי ביה מעמך

it is on the seventh; if one is full and the other defective, it is on the sixth.<span class="x" onmousemove="('comment',' Hence if pentecost is in one year on the fifth and he sanctifies on the sixth, and the next year Pentecost is on the seventh, a full twelvemonth can pass without three festivals.');">¹⁷</span> Who is the Tanna who takes a different view from R'Shemaiah?<span class="x" onmousemove="('comment',' And would not count a year without three festivals.');">¹⁸</span>

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