12 times 5 y/ z. z% T/ e, g+ h. l $ G4 n9 [* i aeach time 4 person but 1 need to back to pick up the other 35.39.217.760 \$ [/ b( B# y0 m0 L' `4 ?
return x 10 = 30 people6 { r1 b4 v3 o# @* g
1 time return ; ?6 p/ Q. S/ w9 H2 g0 {* n9 J2 person on last time 5.39.217.76" G3 M' O$ s7 b& g9 ]% `
total : 12 times